| /* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
| Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #ifndef _PTHREAD_H |
| #define _PTHREAD_H 1 |
| |
| #include <features.h> |
| #include <endian.h> |
| #include <sched.h> |
| #include <time.h> |
| |
| #define __need_sigset_t |
| #include <signal.h> |
| #include <bits/pthreadtypes.h> |
| #include <bits/setjmp.h> |
| #include <bits/wordsize.h> |
| |
| |
| /* Detach state. */ |
| enum |
| { |
| PTHREAD_CREATE_JOINABLE, |
| #define PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_JOINABLE |
| PTHREAD_CREATE_DETACHED |
| #define PTHREAD_CREATE_DETACHED PTHREAD_CREATE_DETACHED |
| }; |
| |
| |
| /* Mutex types. */ |
| enum |
| { |
| PTHREAD_MUTEX_TIMED_NP, |
| PTHREAD_MUTEX_RECURSIVE_NP, |
| PTHREAD_MUTEX_ERRORCHECK_NP, |
| PTHREAD_MUTEX_ADAPTIVE_NP |
| #if defined __USE_UNIX98 || defined __USE_XOPEN2K8 |
| , |
| PTHREAD_MUTEX_NORMAL = PTHREAD_MUTEX_TIMED_NP, |
| PTHREAD_MUTEX_RECURSIVE = PTHREAD_MUTEX_RECURSIVE_NP, |
| PTHREAD_MUTEX_ERRORCHECK = PTHREAD_MUTEX_ERRORCHECK_NP, |
| PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL |
| #endif |
| #ifdef __USE_GNU |
| /* For compatibility. */ |
| , PTHREAD_MUTEX_FAST_NP = PTHREAD_MUTEX_TIMED_NP |
| #endif |
| }; |
| |
| |
| #ifdef __USE_XOPEN2K |
| /* Robust mutex or not flags. */ |
| enum |
| { |
| PTHREAD_MUTEX_STALLED, |
| PTHREAD_MUTEX_STALLED_NP = PTHREAD_MUTEX_STALLED, |
| PTHREAD_MUTEX_ROBUST, |
| PTHREAD_MUTEX_ROBUST_NP = PTHREAD_MUTEX_ROBUST |
| }; |
| #endif |
| |
| |
| #ifdef __USE_UNIX98 |
| /* Mutex protocols. */ |
| enum |
| { |
| PTHREAD_PRIO_NONE, |
| PTHREAD_PRIO_INHERIT, |
| PTHREAD_PRIO_PROTECT |
| }; |
| #endif |
| |
| |
| /* Mutex initializers. */ |
| #if __WORDSIZE == 64 |
| # define PTHREAD_MUTEX_INITIALIZER \ |
| { { 0, 0, 0, 0, 0, 0, { 0, 0 } } } |
| # ifdef __USE_GNU |
| # define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \ |
| { { 0, 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { 0, 0 } } } |
| # define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \ |
| { { 0, 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, { 0, 0 } } } |
| # define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \ |
| { { 0, 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, { 0, 0 } } } |
| # endif |
| #else |
| # define PTHREAD_MUTEX_INITIALIZER \ |
| { { 0, 0, 0, 0, 0, { 0 } } } |
| # ifdef __USE_GNU |
| # define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \ |
| { { 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { 0 } } } |
| # define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \ |
| { { 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, { 0 } } } |
| # define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \ |
| { { 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, { 0 } } } |
| # endif |
| #endif |
| |
| |
| /* Read-write lock types. */ |
| #if defined __USE_UNIX98 || defined __USE_XOPEN2K |
| enum |
| { |
| PTHREAD_RWLOCK_PREFER_READER_NP, |
| PTHREAD_RWLOCK_PREFER_WRITER_NP, |
| PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, |
| PTHREAD_RWLOCK_DEFAULT_NP = PTHREAD_RWLOCK_PREFER_READER_NP |
| }; |
| |
| /* Read-write lock initializers. */ |
| # define PTHREAD_RWLOCK_INITIALIZER \ |
| { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } } |
| # ifdef __USE_GNU |
| # if __WORDSIZE == 64 |
| # define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ |
| { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ |
| PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP } } |
| # else |
| # if __BYTE_ORDER == __LITTLE_ENDIAN |
| # define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ |
| { { 0, 0, 0, 0, 0, 0, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, \ |
| 0, 0, 0, 0 } } |
| # else |
| # define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ |
| { { 0, 0, 0, 0, 0, 0, 0, 0, 0, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,\ |
| 0 } } |
| # endif |
| # endif |
| # endif |
| #endif /* Unix98 or XOpen2K */ |
| |
| |
| /* Scheduler inheritance. */ |
| enum |
| { |
| PTHREAD_INHERIT_SCHED, |
| #define PTHREAD_INHERIT_SCHED PTHREAD_INHERIT_SCHED |
| PTHREAD_EXPLICIT_SCHED |
| #define PTHREAD_EXPLICIT_SCHED PTHREAD_EXPLICIT_SCHED |
| }; |
| |
| |
| /* Scope handling. */ |
| enum |
| { |
| PTHREAD_SCOPE_SYSTEM, |
| #define PTHREAD_SCOPE_SYSTEM PTHREAD_SCOPE_SYSTEM |
| PTHREAD_SCOPE_PROCESS |
| #define PTHREAD_SCOPE_PROCESS PTHREAD_SCOPE_PROCESS |
| }; |
| |
| |
| /* Process shared or private flag. */ |
| enum |
| { |
| PTHREAD_PROCESS_PRIVATE, |
| #define PTHREAD_PROCESS_PRIVATE PTHREAD_PROCESS_PRIVATE |
| PTHREAD_PROCESS_SHARED |
| #define PTHREAD_PROCESS_SHARED PTHREAD_PROCESS_SHARED |
| }; |
| |
| |
| |
| /* Conditional variable handling. */ |
| #define PTHREAD_COND_INITIALIZER { { 0, 0, 0, 0, 0, (void *) 0, 0, 0 } } |
| |
| |
| /* Cleanup buffers */ |
| struct _pthread_cleanup_buffer |
| { |
| void (*__routine) (void *); /* Function to call. */ |
| void *__arg; /* Its argument. */ |
| int __canceltype; /* Saved cancellation type. */ |
| struct _pthread_cleanup_buffer *__prev; /* Chaining of cleanup functions. */ |
| }; |
| |
| /* Cancellation */ |
| enum |
| { |
| PTHREAD_CANCEL_ENABLE, |
| #define PTHREAD_CANCEL_ENABLE PTHREAD_CANCEL_ENABLE |
| PTHREAD_CANCEL_DISABLE |
| #define PTHREAD_CANCEL_DISABLE PTHREAD_CANCEL_DISABLE |
| }; |
| enum |
| { |
| PTHREAD_CANCEL_DEFERRED, |
| #define PTHREAD_CANCEL_DEFERRED PTHREAD_CANCEL_DEFERRED |
| PTHREAD_CANCEL_ASYNCHRONOUS |
| #define PTHREAD_CANCEL_ASYNCHRONOUS PTHREAD_CANCEL_ASYNCHRONOUS |
| }; |
| #define PTHREAD_CANCELED ((void *) -1) |
| |
| |
| /* Single execution handling. */ |
| #define PTHREAD_ONCE_INIT 0 |
| |
| |
| #ifdef __USE_XOPEN2K |
| /* Value returned by 'pthread_barrier_wait' for one of the threads after |
| the required number of threads have called this function. |
| -1 is distinct from 0 and all errno constants */ |
| # define PTHREAD_BARRIER_SERIAL_THREAD -1 |
| #endif |
| |
| |
| __BEGIN_DECLS |
| |
| /* Create a new thread, starting with execution of START-ROUTINE |
| getting passed ARG. Creation attributed come from ATTR. The new |
| handle is stored in *NEWTHREAD. */ |
| extern int pthread_create (pthread_t *__restrict __newthread, |
| __const pthread_attr_t *__restrict __attr, |
| void *(*__start_routine) (void *), |
| void *__restrict __arg) __THROW __nonnull ((1, 3)); |
| |
| /* Terminate calling thread. |
| |
| The registered cleanup handlers are called via exception handling |
| so we cannot mark this function with __THROW.*/ |
| extern void pthread_exit (void *__retval) __attribute__ ((__noreturn__)); |
| |
| /* Make calling thread wait for termination of the thread TH. The |
| exit status of the thread is stored in *THREAD_RETURN, if THREAD_RETURN |
| is not NULL. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern int pthread_join (pthread_t __th, void **__thread_return); |
| |
| #ifdef __USE_GNU |
| /* Check whether thread TH has terminated. If yes return the status of |
| the thread in *THREAD_RETURN, if THREAD_RETURN is not NULL. */ |
| extern int pthread_tryjoin_np (pthread_t __th, void **__thread_return) __THROW; |
| |
| /* Make calling thread wait for termination of the thread TH, but only |
| until TIMEOUT. The exit status of the thread is stored in |
| *THREAD_RETURN, if THREAD_RETURN is not NULL. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern int pthread_timedjoin_np (pthread_t __th, void **__thread_return, |
| __const struct timespec *__abstime); |
| #endif |
| |
| /* Indicate that the thread TH is never to be joined with PTHREAD_JOIN. |
| The resources of TH will therefore be freed immediately when it |
| terminates, instead of waiting for another thread to perform PTHREAD_JOIN |
| on it. */ |
| extern int pthread_detach (pthread_t __th) __THROW; |
| |
| |
| /* Obtain the identifier of the current thread. */ |
| extern pthread_t pthread_self (void) __THROW __attribute__ ((__const__)); |
| |
| /* Compare two thread identifiers. */ |
| extern int pthread_equal (pthread_t __thread1, pthread_t __thread2) __THROW; |
| |
| |
| /* Thread attribute handling. */ |
| |
| /* Initialize thread attribute *ATTR with default attributes |
| (detachstate is PTHREAD_JOINABLE, scheduling policy is SCHED_OTHER, |
| no user-provided stack). */ |
| extern int pthread_attr_init (pthread_attr_t *__attr) __THROW __nonnull ((1)); |
| |
| /* Destroy thread attribute *ATTR. */ |
| extern int pthread_attr_destroy (pthread_attr_t *__attr) |
| __THROW __nonnull ((1)); |
| |
| /* Get detach state attribute. */ |
| extern int pthread_attr_getdetachstate (__const pthread_attr_t *__attr, |
| int *__detachstate) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set detach state attribute. */ |
| extern int pthread_attr_setdetachstate (pthread_attr_t *__attr, |
| int __detachstate) |
| __THROW __nonnull ((1)); |
| |
| |
| /* Get the size of the guard area created for stack overflow protection. */ |
| extern int pthread_attr_getguardsize (__const pthread_attr_t *__attr, |
| size_t *__guardsize) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set the size of the guard area created for stack overflow protection. */ |
| extern int pthread_attr_setguardsize (pthread_attr_t *__attr, |
| size_t __guardsize) |
| __THROW __nonnull ((1)); |
| |
| |
| /* Return in *PARAM the scheduling parameters of *ATTR. */ |
| extern int pthread_attr_getschedparam (__const pthread_attr_t *__restrict |
| __attr, |
| struct sched_param *__restrict __param) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set scheduling parameters (priority, etc) in *ATTR according to PARAM. */ |
| extern int pthread_attr_setschedparam (pthread_attr_t *__restrict __attr, |
| __const struct sched_param *__restrict |
| __param) __THROW __nonnull ((1, 2)); |
| |
| /* Return in *POLICY the scheduling policy of *ATTR. */ |
| extern int pthread_attr_getschedpolicy (__const pthread_attr_t *__restrict |
| __attr, int *__restrict __policy) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set scheduling policy in *ATTR according to POLICY. */ |
| extern int pthread_attr_setschedpolicy (pthread_attr_t *__attr, int __policy) |
| __THROW __nonnull ((1)); |
| |
| /* Return in *INHERIT the scheduling inheritance mode of *ATTR. */ |
| extern int pthread_attr_getinheritsched (__const pthread_attr_t *__restrict |
| __attr, int *__restrict __inherit) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set scheduling inheritance mode in *ATTR according to INHERIT. */ |
| extern int pthread_attr_setinheritsched (pthread_attr_t *__attr, |
| int __inherit) |
| __THROW __nonnull ((1)); |
| |
| |
| /* Return in *SCOPE the scheduling contention scope of *ATTR. */ |
| extern int pthread_attr_getscope (__const pthread_attr_t *__restrict __attr, |
| int *__restrict __scope) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set scheduling contention scope in *ATTR according to SCOPE. */ |
| extern int pthread_attr_setscope (pthread_attr_t *__attr, int __scope) |
| __THROW __nonnull ((1)); |
| |
| /* Return the previously set address for the stack. */ |
| extern int pthread_attr_getstackaddr (__const pthread_attr_t *__restrict |
| __attr, void **__restrict __stackaddr) |
| __THROW __nonnull ((1, 2)) __attribute_deprecated__; |
| |
| /* Set the starting address of the stack of the thread to be created. |
| Depending on whether the stack grows up or down the value must either |
| be higher or lower than all the address in the memory block. The |
| minimal size of the block must be PTHREAD_STACK_MIN. */ |
| extern int pthread_attr_setstackaddr (pthread_attr_t *__attr, |
| void *__stackaddr) |
| __THROW __nonnull ((1)) __attribute_deprecated__; |
| |
| /* Return the currently used minimal stack size. */ |
| extern int pthread_attr_getstacksize (__const pthread_attr_t *__restrict |
| __attr, size_t *__restrict __stacksize) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Add information about the minimum stack size needed for the thread |
| to be started. This size must never be less than PTHREAD_STACK_MIN |
| and must also not exceed the system limits. */ |
| extern int pthread_attr_setstacksize (pthread_attr_t *__attr, |
| size_t __stacksize) |
| __THROW __nonnull ((1)); |
| |
| #ifdef __USE_XOPEN2K |
| /* Return the previously set address for the stack. */ |
| extern int pthread_attr_getstack (__const pthread_attr_t *__restrict __attr, |
| void **__restrict __stackaddr, |
| size_t *__restrict __stacksize) |
| __THROW __nonnull ((1, 2, 3)); |
| |
| /* The following two interfaces are intended to replace the last two. They |
| require setting the address as well as the size since only setting the |
| address will make the implementation on some architectures impossible. */ |
| extern int pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr, |
| size_t __stacksize) __THROW __nonnull ((1)); |
| #endif |
| |
| #ifdef __USE_GNU |
| /* Thread created with attribute ATTR will be limited to run only on |
| the processors represented in CPUSET. */ |
| extern int pthread_attr_setaffinity_np (pthread_attr_t *__attr, |
| size_t __cpusetsize, |
| __const cpu_set_t *__cpuset) |
| __THROW __nonnull ((1, 3)); |
| |
| /* Get bit set in CPUSET representing the processors threads created with |
| ATTR can run on. */ |
| extern int pthread_attr_getaffinity_np (__const pthread_attr_t *__attr, |
| size_t __cpusetsize, |
| cpu_set_t *__cpuset) |
| __THROW __nonnull ((1, 3)); |
| |
| |
| /* Initialize thread attribute *ATTR with attributes corresponding to the |
| already running thread TH. It shall be called on uninitialized ATTR |
| and destroyed with pthread_attr_destroy when no longer needed. */ |
| extern int pthread_getattr_np (pthread_t __th, pthread_attr_t *__attr) |
| __THROW __nonnull ((2)); |
| #endif |
| |
| |
| /* Functions for scheduling control. */ |
| |
| /* Set the scheduling parameters for TARGET_THREAD according to POLICY |
| and *PARAM. */ |
| extern int pthread_setschedparam (pthread_t __target_thread, int __policy, |
| __const struct sched_param *__param) |
| __THROW __nonnull ((3)); |
| |
| /* Return in *POLICY and *PARAM the scheduling parameters for TARGET_THREAD. */ |
| extern int pthread_getschedparam (pthread_t __target_thread, |
| int *__restrict __policy, |
| struct sched_param *__restrict __param) |
| __THROW __nonnull ((2, 3)); |
| |
| /* Set the scheduling priority for TARGET_THREAD. */ |
| extern int pthread_setschedprio (pthread_t __target_thread, int __prio) |
| __THROW; |
| |
| |
| #if defined __USE_UNIX98 && defined __UCLIBC_SUSV4_LEGACY__ |
| /* Determine level of concurrency. */ |
| extern int pthread_getconcurrency (void) __THROW; |
| |
| /* Set new concurrency level to LEVEL. */ |
| extern int pthread_setconcurrency (int __level) __THROW; |
| #endif |
| |
| #ifdef __USE_GNU |
| /* Yield the processor to another thread or process. |
| This function is similar to the POSIX `sched_yield' function but |
| might be differently implemented in the case of a m-on-n thread |
| implementation. */ |
| extern int pthread_yield (void) __THROW; |
| |
| |
| /* Limit specified thread TH to run only on the processors represented |
| in CPUSET. */ |
| extern int pthread_setaffinity_np (pthread_t __th, size_t __cpusetsize, |
| __const cpu_set_t *__cpuset) |
| __THROW __nonnull ((3)); |
| |
| /* Get bit set in CPUSET representing the processors TH can run on. */ |
| extern int pthread_getaffinity_np (pthread_t __th, size_t __cpusetsize, |
| cpu_set_t *__cpuset) |
| __THROW __nonnull ((3)); |
| #endif |
| |
| |
| /* Functions for handling initialization. */ |
| |
| /* Guarantee that the initialization function INIT_ROUTINE will be called |
| only once, even if pthread_once is executed several times with the |
| same ONCE_CONTROL argument. ONCE_CONTROL must point to a static or |
| extern variable initialized to PTHREAD_ONCE_INIT. |
| |
| The initialization functions might throw exception which is why |
| this function is not marked with __THROW. */ |
| extern int pthread_once (pthread_once_t *__once_control, |
| void (*__init_routine) (void)) __nonnull ((1, 2)); |
| |
| |
| /* Functions for handling cancellation. |
| |
| Note that these functions are explicitly not marked to not throw an |
| exception in C++ code. If cancellation is implemented by unwinding |
| this is necessary to have the compiler generate the unwind information. */ |
| |
| /* Set cancelability state of current thread to STATE, returning old |
| state in *OLDSTATE if OLDSTATE is not NULL. */ |
| extern int pthread_setcancelstate (int __state, int *__oldstate); |
| |
| /* Set cancellation state of current thread to TYPE, returning the old |
| type in *OLDTYPE if OLDTYPE is not NULL. */ |
| extern int pthread_setcanceltype (int __type, int *__oldtype); |
| |
| /* Cancel THREAD immediately or at the next possibility. */ |
| extern int pthread_cancel (pthread_t __th); |
| |
| /* Test for pending cancellation for the current thread and terminate |
| the thread as per pthread_exit(PTHREAD_CANCELED) if it has been |
| cancelled. */ |
| extern void pthread_testcancel (void); |
| |
| |
| /* Cancellation handling with integration into exception handling. */ |
| |
| typedef struct |
| { |
| struct |
| { |
| __jmp_buf __cancel_jmp_buf; |
| int __mask_was_saved; |
| } __cancel_jmp_buf[1]; |
| void *__pad[4]; |
| } __pthread_unwind_buf_t __attribute__ ((__aligned__)); |
| |
| /* No special attributes by default. */ |
| #ifndef __cleanup_fct_attribute |
| # define __cleanup_fct_attribute |
| #endif |
| |
| |
| /* Structure to hold the cleanup handler information. */ |
| struct __pthread_cleanup_frame |
| { |
| void (*__cancel_routine) (void *); |
| void *__cancel_arg; |
| int __do_it; |
| int __cancel_type; |
| }; |
| |
| #if defined __GNUC__ && defined __EXCEPTIONS |
| # ifdef __cplusplus |
| /* Class to handle cancellation handler invocation. */ |
| class __pthread_cleanup_class |
| { |
| void (*__cancel_routine) (void *); |
| void *__cancel_arg; |
| int __do_it; |
| int __cancel_type; |
| |
| public: |
| __pthread_cleanup_class (void (*__fct) (void *), void *__arg) |
| : __cancel_routine (__fct), __cancel_arg (__arg), __do_it (1) { } |
| ~__pthread_cleanup_class () { if (__do_it) __cancel_routine (__cancel_arg); } |
| void __setdoit (int __newval) { __do_it = __newval; } |
| void __defer () { pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED, |
| &__cancel_type); } |
| void __restore () const { pthread_setcanceltype (__cancel_type, 0); } |
| }; |
| |
| /* Install a cleanup handler: ROUTINE will be called with arguments ARG |
| when the thread is canceled or calls pthread_exit. ROUTINE will also |
| be called with arguments ARG when the matching pthread_cleanup_pop |
| is executed with non-zero EXECUTE argument. |
| |
| pthread_cleanup_push and pthread_cleanup_pop are macros and must always |
| be used in matching pairs at the same nesting level of braces. */ |
| # define pthread_cleanup_push(routine, arg) \ |
| do { \ |
| __pthread_cleanup_class __clframe (routine, arg) |
| |
| /* Remove a cleanup handler installed by the matching pthread_cleanup_push. |
| If EXECUTE is non-zero, the handler function is called. */ |
| # define pthread_cleanup_pop(execute) \ |
| __clframe.__setdoit (execute); \ |
| } while (0) |
| |
| # ifdef __USE_GNU |
| /* Install a cleanup handler as pthread_cleanup_push does, but also |
| saves the current cancellation type and sets it to deferred |
| cancellation. */ |
| # define pthread_cleanup_push_defer_np(routine, arg) \ |
| do { \ |
| __pthread_cleanup_class __clframe (routine, arg); \ |
| __clframe.__defer () |
| |
| /* Remove a cleanup handler as pthread_cleanup_pop does, but also |
| restores the cancellation type that was in effect when the matching |
| pthread_cleanup_push_defer was called. */ |
| # define pthread_cleanup_pop_restore_np(execute) \ |
| __clframe.__restore (); \ |
| __clframe.__setdoit (execute); \ |
| } while (0) |
| # endif |
| # else |
| /* Function called to call the cleanup handler. As an extern inline |
| function the compiler is free to decide inlining the change when |
| needed or fall back on the copy which must exist somewhere |
| else. */ |
| __extern_inline void |
| __pthread_cleanup_routine (struct __pthread_cleanup_frame *__frame) |
| { |
| if (__frame->__do_it) |
| __frame->__cancel_routine (__frame->__cancel_arg); |
| } |
| |
| /* Install a cleanup handler: ROUTINE will be called with arguments ARG |
| when the thread is canceled or calls pthread_exit. ROUTINE will also |
| be called with arguments ARG when the matching pthread_cleanup_pop |
| is executed with non-zero EXECUTE argument. |
| |
| pthread_cleanup_push and pthread_cleanup_pop are macros and must always |
| be used in matching pairs at the same nesting level of braces. */ |
| # define pthread_cleanup_push(routine, arg) \ |
| do { \ |
| struct __pthread_cleanup_frame __clframe \ |
| __attribute__ ((__cleanup__ (__pthread_cleanup_routine))) \ |
| = { .__cancel_routine = (routine), .__cancel_arg = (arg), \ |
| .__do_it = 1 }; |
| |
| /* Remove a cleanup handler installed by the matching pthread_cleanup_push. |
| If EXECUTE is non-zero, the handler function is called. */ |
| # define pthread_cleanup_pop(execute) \ |
| __clframe.__do_it = (execute); \ |
| } while (0) |
| |
| # ifdef __USE_GNU |
| /* Install a cleanup handler as pthread_cleanup_push does, but also |
| saves the current cancellation type and sets it to deferred |
| cancellation. */ |
| # define pthread_cleanup_push_defer_np(routine, arg) \ |
| do { \ |
| struct __pthread_cleanup_frame __clframe \ |
| __attribute__ ((__cleanup__ (__pthread_cleanup_routine))) \ |
| = { .__cancel_routine = (routine), .__cancel_arg = (arg), \ |
| .__do_it = 1 }; \ |
| (void) pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED, \ |
| &__clframe.__cancel_type) |
| |
| /* Remove a cleanup handler as pthread_cleanup_pop does, but also |
| restores the cancellation type that was in effect when the matching |
| pthread_cleanup_push_defer was called. */ |
| # define pthread_cleanup_pop_restore_np(execute) \ |
| (void) pthread_setcanceltype (__clframe.__cancel_type, NULL); \ |
| __clframe.__do_it = (execute); \ |
| } while (0) |
| # endif |
| # endif |
| #else |
| /* Install a cleanup handler: ROUTINE will be called with arguments ARG |
| when the thread is canceled or calls pthread_exit. ROUTINE will also |
| be called with arguments ARG when the matching pthread_cleanup_pop |
| is executed with non-zero EXECUTE argument. |
| |
| pthread_cleanup_push and pthread_cleanup_pop are macros and must always |
| be used in matching pairs at the same nesting level of braces. */ |
| # define pthread_cleanup_push(routine, arg) \ |
| do { \ |
| __pthread_unwind_buf_t __cancel_buf; \ |
| void (*__cancel_routine) (void *) = (routine); \ |
| void *__cancel_arg = (arg); \ |
| int not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *) \ |
| __cancel_buf.__cancel_jmp_buf, 0); \ |
| if (__builtin_expect (not_first_call, 0)) \ |
| { \ |
| __cancel_routine (__cancel_arg); \ |
| __pthread_unwind_next (&__cancel_buf); \ |
| /* NOTREACHED */ \ |
| } \ |
| \ |
| __pthread_register_cancel (&__cancel_buf); \ |
| do { |
| extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf) |
| __cleanup_fct_attribute; |
| |
| /* Remove a cleanup handler installed by the matching pthread_cleanup_push. |
| If EXECUTE is non-zero, the handler function is called. */ |
| # define pthread_cleanup_pop(execute) \ |
| do { } while (0);/* Empty to allow label before pthread_cleanup_pop. */\ |
| } while (0); \ |
| __pthread_unregister_cancel (&__cancel_buf); \ |
| if (execute) \ |
| __cancel_routine (__cancel_arg); \ |
| } while (0) |
| extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf) |
| __cleanup_fct_attribute; |
| |
| # ifdef __USE_GNU |
| /* Install a cleanup handler as pthread_cleanup_push does, but also |
| saves the current cancellation type and sets it to deferred |
| cancellation. */ |
| # define pthread_cleanup_push_defer_np(routine, arg) \ |
| do { \ |
| __pthread_unwind_buf_t __cancel_buf; \ |
| void (*__cancel_routine) (void *) = (routine); \ |
| void *__cancel_arg = (arg); \ |
| int not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *) \ |
| __cancel_buf.__cancel_jmp_buf, 0); \ |
| if (__builtin_expect (not_first_call, 0)) \ |
| { \ |
| __cancel_routine (__cancel_arg); \ |
| __pthread_unwind_next (&__cancel_buf); \ |
| /* NOTREACHED */ \ |
| } \ |
| \ |
| __pthread_register_cancel_defer (&__cancel_buf); \ |
| do { |
| extern void __pthread_register_cancel_defer (__pthread_unwind_buf_t *__buf) |
| __cleanup_fct_attribute; |
| |
| /* Remove a cleanup handler as pthread_cleanup_pop does, but also |
| restores the cancellation type that was in effect when the matching |
| pthread_cleanup_push_defer was called. */ |
| # define pthread_cleanup_pop_restore_np(execute) \ |
| do { } while (0);/* Empty to allow label before pthread_cleanup_pop. */\ |
| } while (0); \ |
| __pthread_unregister_cancel_restore (&__cancel_buf); \ |
| if (execute) \ |
| __cancel_routine (__cancel_arg); \ |
| } while (0) |
| extern void __pthread_unregister_cancel_restore (__pthread_unwind_buf_t *__buf) |
| __cleanup_fct_attribute; |
| # endif |
| |
| /* Internal interface to initiate cleanup. */ |
| extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf) |
| __cleanup_fct_attribute __attribute__ ((__noreturn__)) |
| # ifndef SHARED |
| __attribute__ ((__weak__)) |
| # endif |
| ; |
| #endif |
| |
| /* Function used in the macros. */ |
| struct __jmp_buf_tag; |
| extern int __sigsetjmp (struct __jmp_buf_tag *__env, int __savemask) __THROW; |
| |
| |
| /* Mutex handling. */ |
| |
| /* Initialize a mutex. */ |
| extern int pthread_mutex_init (pthread_mutex_t *__mutex, |
| __const pthread_mutexattr_t *__mutexattr) |
| __THROW __nonnull ((1)); |
| |
| /* Destroy a mutex. */ |
| extern int pthread_mutex_destroy (pthread_mutex_t *__mutex) |
| __THROW __nonnull ((1)); |
| |
| /* Try locking a mutex. */ |
| extern int pthread_mutex_trylock (pthread_mutex_t *__mutex) |
| __THROW __nonnull ((1)); |
| |
| /* Lock a mutex. */ |
| extern int pthread_mutex_lock (pthread_mutex_t *__mutex) |
| __THROW __nonnull ((1)); |
| |
| #ifdef __USE_XOPEN2K |
| /* Wait until lock becomes available, or specified time passes. */ |
| extern int pthread_mutex_timedlock (pthread_mutex_t *__restrict __mutex, |
| __const struct timespec *__restrict |
| __abstime) __THROW __nonnull ((1, 2)); |
| #endif |
| |
| /* Unlock a mutex. */ |
| extern int pthread_mutex_unlock (pthread_mutex_t *__mutex) |
| __THROW __nonnull ((1)); |
| |
| |
| /* Get the priority ceiling of MUTEX. */ |
| extern int pthread_mutex_getprioceiling (__const pthread_mutex_t * |
| __restrict __mutex, |
| int *__restrict __prioceiling) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set the priority ceiling of MUTEX to PRIOCEILING, return old |
| priority ceiling value in *OLD_CEILING. */ |
| extern int pthread_mutex_setprioceiling (pthread_mutex_t *__restrict __mutex, |
| int __prioceiling, |
| int *__restrict __old_ceiling) |
| __THROW __nonnull ((1, 3)); |
| |
| |
| #ifdef __USE_XOPEN2K8 |
| /* Declare the state protected by MUTEX as consistent. */ |
| extern int pthread_mutex_consistent (pthread_mutex_t *__mutex) |
| __THROW __nonnull ((1)); |
| # ifdef __USE_GNU |
| extern int pthread_mutex_consistent_np (pthread_mutex_t *__mutex) |
| __THROW __nonnull ((1)); |
| # endif |
| #endif |
| |
| |
| /* Functions for handling mutex attributes. */ |
| |
| /* Initialize mutex attribute object ATTR with default attributes |
| (kind is PTHREAD_MUTEX_TIMED_NP). */ |
| extern int pthread_mutexattr_init (pthread_mutexattr_t *__attr) |
| __THROW __nonnull ((1)); |
| |
| /* Destroy mutex attribute object ATTR. */ |
| extern int pthread_mutexattr_destroy (pthread_mutexattr_t *__attr) |
| __THROW __nonnull ((1)); |
| |
| /* Get the process-shared flag of the mutex attribute ATTR. */ |
| extern int pthread_mutexattr_getpshared (__const pthread_mutexattr_t * |
| __restrict __attr, |
| int *__restrict __pshared) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set the process-shared flag of the mutex attribute ATTR. */ |
| extern int pthread_mutexattr_setpshared (pthread_mutexattr_t *__attr, |
| int __pshared) |
| __THROW __nonnull ((1)); |
| |
| #if defined __USE_UNIX98 || defined __USE_XOPEN2K8 |
| /* Return in *KIND the mutex kind attribute in *ATTR. */ |
| extern int pthread_mutexattr_gettype (__const pthread_mutexattr_t *__restrict |
| __attr, int *__restrict __kind) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set the mutex kind attribute in *ATTR to KIND (either PTHREAD_MUTEX_NORMAL, |
| PTHREAD_MUTEX_RECURSIVE, PTHREAD_MUTEX_ERRORCHECK, or |
| PTHREAD_MUTEX_DEFAULT). */ |
| extern int pthread_mutexattr_settype (pthread_mutexattr_t *__attr, int __kind) |
| __THROW __nonnull ((1)); |
| #endif |
| |
| /* Return in *PROTOCOL the mutex protocol attribute in *ATTR. */ |
| extern int pthread_mutexattr_getprotocol (__const pthread_mutexattr_t * |
| __restrict __attr, |
| int *__restrict __protocol) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set the mutex protocol attribute in *ATTR to PROTOCOL (either |
| PTHREAD_PRIO_NONE, PTHREAD_PRIO_INHERIT, or PTHREAD_PRIO_PROTECT). */ |
| extern int pthread_mutexattr_setprotocol (pthread_mutexattr_t *__attr, |
| int __protocol) |
| __THROW __nonnull ((1)); |
| |
| /* Return in *PRIOCEILING the mutex prioceiling attribute in *ATTR. */ |
| extern int pthread_mutexattr_getprioceiling (__const pthread_mutexattr_t * |
| __restrict __attr, |
| int *__restrict __prioceiling) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set the mutex prioceiling attribute in *ATTR to PRIOCEILING. */ |
| extern int pthread_mutexattr_setprioceiling (pthread_mutexattr_t *__attr, |
| int __prioceiling) |
| __THROW __nonnull ((1)); |
| |
| #ifdef __USE_XOPEN2K |
| /* Get the robustness flag of the mutex attribute ATTR. */ |
| extern int pthread_mutexattr_getrobust (__const pthread_mutexattr_t *__attr, |
| int *__robustness) |
| __THROW __nonnull ((1, 2)); |
| # ifdef __USE_GNU |
| extern int pthread_mutexattr_getrobust_np (__const pthread_mutexattr_t *__attr, |
| int *__robustness) |
| __THROW __nonnull ((1, 2)); |
| # endif |
| |
| /* Set the robustness flag of the mutex attribute ATTR. */ |
| extern int pthread_mutexattr_setrobust (pthread_mutexattr_t *__attr, |
| int __robustness) |
| __THROW __nonnull ((1)); |
| # ifdef __USE_GNU |
| extern int pthread_mutexattr_setrobust_np (pthread_mutexattr_t *__attr, |
| int __robustness) |
| __THROW __nonnull ((1)); |
| # endif |
| #endif |
| |
| |
| #if defined __USE_UNIX98 || defined __USE_XOPEN2K |
| /* Functions for handling read-write locks. */ |
| |
| /* Initialize read-write lock RWLOCK using attributes ATTR, or use |
| the default values if later is NULL. */ |
| extern int pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock, |
| __const pthread_rwlockattr_t *__restrict |
| __attr) __THROW __nonnull ((1)); |
| |
| /* Destroy read-write lock RWLOCK. */ |
| extern int pthread_rwlock_destroy (pthread_rwlock_t *__rwlock) |
| __THROW __nonnull ((1)); |
| |
| /* Acquire read lock for RWLOCK. */ |
| extern int pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock) |
| __THROW __nonnull ((1)); |
| |
| /* Try to acquire read lock for RWLOCK. */ |
| extern int pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock) |
| __THROW __nonnull ((1)); |
| |
| # ifdef __USE_XOPEN2K |
| /* Try to acquire read lock for RWLOCK or return after specfied time. */ |
| extern int pthread_rwlock_timedrdlock (pthread_rwlock_t *__restrict __rwlock, |
| __const struct timespec *__restrict |
| __abstime) __THROW __nonnull ((1, 2)); |
| # endif |
| |
| /* Acquire write lock for RWLOCK. */ |
| extern int pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock) |
| __THROW __nonnull ((1)); |
| |
| /* Try to acquire write lock for RWLOCK. */ |
| extern int pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock) |
| __THROW __nonnull ((1)); |
| |
| # ifdef __USE_XOPEN2K |
| /* Try to acquire write lock for RWLOCK or return after specfied time. */ |
| extern int pthread_rwlock_timedwrlock (pthread_rwlock_t *__restrict __rwlock, |
| __const struct timespec *__restrict |
| __abstime) __THROW __nonnull ((1, 2)); |
| # endif |
| |
| /* Unlock RWLOCK. */ |
| extern int pthread_rwlock_unlock (pthread_rwlock_t *__rwlock) |
| __THROW __nonnull ((1)); |
| |
| |
| /* Functions for handling read-write lock attributes. */ |
| |
| /* Initialize attribute object ATTR with default values. */ |
| extern int pthread_rwlockattr_init (pthread_rwlockattr_t *__attr) |
| __THROW __nonnull ((1)); |
| |
| /* Destroy attribute object ATTR. */ |
| extern int pthread_rwlockattr_destroy (pthread_rwlockattr_t *__attr) |
| __THROW __nonnull ((1)); |
| |
| /* Return current setting of process-shared attribute of ATTR in PSHARED. */ |
| extern int pthread_rwlockattr_getpshared (__const pthread_rwlockattr_t * |
| __restrict __attr, |
| int *__restrict __pshared) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set process-shared attribute of ATTR to PSHARED. */ |
| extern int pthread_rwlockattr_setpshared (pthread_rwlockattr_t *__attr, |
| int __pshared) |
| __THROW __nonnull ((1)); |
| |
| /* Return current setting of reader/writer preference. */ |
| extern int pthread_rwlockattr_getkind_np (__const pthread_rwlockattr_t * |
| __restrict __attr, |
| int *__restrict __pref) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set reader/write preference. */ |
| extern int pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *__attr, |
| int __pref) __THROW __nonnull ((1)); |
| #endif |
| |
| |
| /* Functions for handling conditional variables. */ |
| |
| /* Initialize condition variable COND using attributes ATTR, or use |
| the default values if later is NULL. */ |
| extern int pthread_cond_init (pthread_cond_t *__restrict __cond, |
| __const pthread_condattr_t *__restrict |
| __cond_attr) __THROW __nonnull ((1)); |
| |
| /* Destroy condition variable COND. */ |
| extern int pthread_cond_destroy (pthread_cond_t *__cond) |
| __THROW __nonnull ((1)); |
| |
| /* Wake up one thread waiting for condition variable COND. */ |
| extern int pthread_cond_signal (pthread_cond_t *__cond) |
| __THROW __nonnull ((1)); |
| |
| /* Wake up all threads waiting for condition variables COND. */ |
| extern int pthread_cond_broadcast (pthread_cond_t *__cond) |
| __THROW __nonnull ((1)); |
| |
| /* Wait for condition variable COND to be signaled or broadcast. |
| MUTEX is assumed to be locked before. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern int pthread_cond_wait (pthread_cond_t *__restrict __cond, |
| pthread_mutex_t *__restrict __mutex) |
| __nonnull ((1, 2)); |
| |
| /* Wait for condition variable COND to be signaled or broadcast until |
| ABSTIME. MUTEX is assumed to be locked before. ABSTIME is an |
| absolute time specification; zero is the beginning of the epoch |
| (00:00:00 GMT, January 1, 1970). |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern int pthread_cond_timedwait (pthread_cond_t *__restrict __cond, |
| pthread_mutex_t *__restrict __mutex, |
| __const struct timespec *__restrict |
| __abstime) __nonnull ((1, 2, 3)); |
| |
| /* Functions for handling condition variable attributes. */ |
| |
| /* Initialize condition variable attribute ATTR. */ |
| extern int pthread_condattr_init (pthread_condattr_t *__attr) |
| __THROW __nonnull ((1)); |
| |
| /* Destroy condition variable attribute ATTR. */ |
| extern int pthread_condattr_destroy (pthread_condattr_t *__attr) |
| __THROW __nonnull ((1)); |
| |
| /* Get the process-shared flag of the condition variable attribute ATTR. */ |
| extern int pthread_condattr_getpshared (__const pthread_condattr_t * |
| __restrict __attr, |
| int *__restrict __pshared) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set the process-shared flag of the condition variable attribute ATTR. */ |
| extern int pthread_condattr_setpshared (pthread_condattr_t *__attr, |
| int __pshared) __THROW __nonnull ((1)); |
| |
| #ifdef __USE_XOPEN2K |
| /* Get the clock selected for the conditon variable attribute ATTR. */ |
| extern int pthread_condattr_getclock (__const pthread_condattr_t * |
| __restrict __attr, |
| __clockid_t *__restrict __clock_id) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set the clock selected for the conditon variable attribute ATTR. */ |
| extern int pthread_condattr_setclock (pthread_condattr_t *__attr, |
| __clockid_t __clock_id) |
| __THROW __nonnull ((1)); |
| #endif |
| |
| |
| #ifdef __USE_XOPEN2K |
| /* Functions to handle spinlocks. */ |
| |
| /* Initialize the spinlock LOCK. If PSHARED is nonzero the spinlock can |
| be shared between different processes. */ |
| extern int pthread_spin_init (pthread_spinlock_t *__lock, int __pshared) |
| __THROW __nonnull ((1)); |
| |
| /* Destroy the spinlock LOCK. */ |
| extern int pthread_spin_destroy (pthread_spinlock_t *__lock) |
| __THROW __nonnull ((1)); |
| |
| /* Wait until spinlock LOCK is retrieved. */ |
| extern int pthread_spin_lock (pthread_spinlock_t *__lock) |
| __THROW __nonnull ((1)); |
| |
| /* Try to lock spinlock LOCK. */ |
| extern int pthread_spin_trylock (pthread_spinlock_t *__lock) |
| __THROW __nonnull ((1)); |
| |
| /* Release spinlock LOCK. */ |
| extern int pthread_spin_unlock (pthread_spinlock_t *__lock) |
| __THROW __nonnull ((1)); |
| |
| |
| /* Functions to handle barriers. */ |
| |
| /* Initialize BARRIER with the attributes in ATTR. The barrier is |
| opened when COUNT waiters arrived. */ |
| extern int pthread_barrier_init (pthread_barrier_t *__restrict __barrier, |
| __const pthread_barrierattr_t *__restrict |
| __attr, unsigned int __count) |
| __THROW __nonnull ((1)); |
| |
| /* Destroy a previously dynamically initialized barrier BARRIER. */ |
| extern int pthread_barrier_destroy (pthread_barrier_t *__barrier) |
| __THROW __nonnull ((1)); |
| |
| /* Wait on barrier BARRIER. */ |
| extern int pthread_barrier_wait (pthread_barrier_t *__barrier) |
| __THROW __nonnull ((1)); |
| |
| |
| /* Initialize barrier attribute ATTR. */ |
| extern int pthread_barrierattr_init (pthread_barrierattr_t *__attr) |
| __THROW __nonnull ((1)); |
| |
| /* Destroy previously dynamically initialized barrier attribute ATTR. */ |
| extern int pthread_barrierattr_destroy (pthread_barrierattr_t *__attr) |
| __THROW __nonnull ((1)); |
| |
| /* Get the process-shared flag of the barrier attribute ATTR. */ |
| extern int pthread_barrierattr_getpshared (__const pthread_barrierattr_t * |
| __restrict __attr, |
| int *__restrict __pshared) |
| __THROW __nonnull ((1, 2)); |
| |
| /* Set the process-shared flag of the barrier attribute ATTR. */ |
| extern int pthread_barrierattr_setpshared (pthread_barrierattr_t *__attr, |
| int __pshared) |
| __THROW __nonnull ((1)); |
| #endif |
| |
| |
| /* Functions for handling thread-specific data. */ |
| |
| /* Create a key value identifying a location in the thread-specific |
| data area. Each thread maintains a distinct thread-specific data |
| area. DESTR_FUNCTION, if non-NULL, is called with the value |
| associated to that key when the key is destroyed. |
| DESTR_FUNCTION is not called if the value associated is NULL when |
| the key is destroyed. */ |
| extern int pthread_key_create (pthread_key_t *__key, |
| void (*__destr_function) (void *)) |
| __THROW __nonnull ((1)); |
| |
| /* Destroy KEY. */ |
| extern int pthread_key_delete (pthread_key_t __key) __THROW; |
| |
| /* Return current value of the thread-specific data slot identified by KEY. */ |
| extern void *pthread_getspecific (pthread_key_t __key) __THROW; |
| |
| /* Store POINTER in the thread-specific data slot identified by KEY. */ |
| extern int pthread_setspecific (pthread_key_t __key, |
| __const void *__pointer) __THROW ; |
| |
| |
| #ifdef __USE_XOPEN2K |
| /* Get ID of CPU-time clock for thread THREAD_ID. */ |
| extern int pthread_getcpuclockid (pthread_t __thread_id, |
| __clockid_t *__clock_id) |
| __THROW __nonnull ((2)); |
| #endif |
| |
| |
| /* Install handlers to be called when a new process is created with FORK. |
| The PREPARE handler is called in the parent process just before performing |
| FORK. The PARENT handler is called in the parent process just after FORK. |
| The CHILD handler is called in the child process. Each of the three |
| handlers can be NULL, meaning that no handler needs to be called at that |
| point. |
| PTHREAD_ATFORK can be called several times, in which case the PREPARE |
| handlers are called in LIFO order (last added with PTHREAD_ATFORK, |
| first called before FORK), and the PARENT and CHILD handlers are called |
| in FIFO (first added, first called). */ |
| |
| extern int pthread_atfork (void (*__prepare) (void), |
| void (*__parent) (void), |
| void (*__child) (void)) __THROW; |
| |
| |
| #ifdef __USE_EXTERN_INLINES |
| /* Optimizations. */ |
| __extern_inline int |
| __NTH (pthread_equal (pthread_t __thread1, pthread_t __thread2)) |
| { |
| return __thread1 == __thread2; |
| } |
| #endif |
| |
| __END_DECLS |
| |
| #endif /* pthread.h */ |