Here the /usr/include/pthread.h:
/* Copyright (C) 2002-2016 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, see
<http://www.gnu.org/licenses/>.
*/ #ifndef _PTHREAD_H #define _PTHREAD_H 1 #include <features.h> #include
<endian.h> #include
<sched.h> #include <time.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 #if defined
__USE_POSIX199506 || defined __USE_UNIX98 /* Mutex protocols. */ enum {
PTHREAD_PRIO_NONE,
PTHREAD_PRIO_INHERIT, PTHREAD_PRIO_PROTECT }; #endif #ifdef
__PTHREAD_MUTEX_HAVE_PREV # define
PTHREAD_MUTEX_INITIALIZER \ { { 0, 0, 0, 0, 0, __PTHREAD_SPINS, { 0, 0 } }
} # ifdef __USE_GNU #
define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \ { { 0, 0, 0, 0,
PTHREAD_MUTEX_RECURSIVE_NP,
__PTHREAD_SPINS, { 0, 0 } } } # define
PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \ { { 0, 0, 0, 0,
PTHREAD_MUTEX_ERRORCHECK_NP, __PTHREAD_SPINS, { 0, 0 } } } # define
PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \ { { 0, 0, 0, 0,
PTHREAD_MUTEX_ADAPTIVE_NP,
__PTHREAD_SPINS, { 0, 0 } } } # endif #else # define
PTHREAD_MUTEX_INITIALIZER \ { { 0, 0, 0, 0,
0, { __PTHREAD_SPINS } } } # ifdef __USE_GNU # define
PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \ {
{ 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { __PTHREAD_SPINS } } } # define
PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \ { { 0, 0, 0,
PTHREAD_MUTEX_ERRORCHECK_NP, 0, {
__PTHREAD_SPINS } } } # define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \ { {
0, 0, 0,
PTHREAD_MUTEX_ADAPTIVE_NP, 0, { __PTHREAD_SPINS } } } # 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 }; /* Define
__PTHREAD_RWLOCK_INT_FLAGS_SHARED to 1 if pthread_rwlock_t has the shared
field. All 64-bit
architectures have the shared field in pthread_rwlock_t. */ #ifndef
__PTHREAD_RWLOCK_INT_FLAGS_SHARED # if __WORDSIZE == 64 # define
__PTHREAD_RWLOCK_INT_FLAGS_SHARED 1 # endif #endif /* Read-write lock
initializers. */ # define
PTHREAD_RWLOCK_INITIALIZER \ { { 0, 0, 0, 0, 0, 0, 0, 0,
__PTHREAD_RWLOCK_ELISION_EXTRA, 0, 0 }
} # ifdef __USE_GNU # ifdef __PTHREAD_RWLOCK_INT_FLAGS_SHARED # define
PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ { { 0, 0, 0, 0, 0, 0,
0, 0,
__PTHREAD_RWLOCK_ELISION_EXTRA, 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,
__PTHREAD_RWLOCK_ELISION_EXTRA, 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) __THROWNL __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 __attribute__ ((__const__)); /* 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)); /*
Get the default attributes used by pthread_create in this process. */
extern int
pthread_getattr_default_np (pthread_attr_t *__attr) __THROW __nonnull
((1)); /* Set the default
attributes to be used by pthread_create in this process. */ extern int
pthread_setattr_default_np (const pthread_attr_t *__attr) __THROW __nonnull
((1)); /* 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; #ifdef __USE_GNU /* Get thread name visible in the kernel and its
interfaces. */ extern
int pthread_getname_np (pthread_t __target_thread, char *__buf, size_t
__buflen) __THROW
__nonnull ((2)); /* Set thread name visible in the kernel and its
interfaces. */ extern int
pthread_setname_np (pthread_t __target_thread, const char *__name) __THROW
__nonnull ((2));
#endif #ifdef __USE_UNIX98 /* 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 (__glibc_unlikely
(__not_first_call)) \ { \
__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
(__glibc_unlikely (__not_first_call)) \ { \ __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) __THROWNL;
/* 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) __THROWNL
__nonnull ((1)); /* Lock a mutex. */ extern int pthread_mutex_lock
(pthread_mutex_t *__mutex)
__THROWNL __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) __THROWNL __nonnull
((1, 2)); #endif /*
Unlock a mutex. */ extern int pthread_mutex_unlock (pthread_mutex_t
*__mutex) __THROWNL
__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) __THROWNL __nonnull ((1)); /* Try to acquire read lock for
RWLOCK. */ extern int
pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock) __THROWNL __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) __THROWNL __nonnull ((1, 2)); # endif /* Acquire
write lock for RWLOCK.
*/ extern int pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock) __THROWNL
__nonnull ((1)); /*
Try to acquire write lock for RWLOCK. */ extern int
pthread_rwlock_trywrlock (pthread_rwlock_t
*__rwlock) __THROWNL __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)
__THROWNL __nonnull ((1, 2));
# endif /* Unlock RWLOCK. */ extern int pthread_rwlock_unlock
(pthread_rwlock_t *__rwlock)
__THROWNL __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)
__THROWNL __nonnull ((1)); /* Wake up all threads waiting for condition
variables COND. */
extern int pthread_cond_broadcast (pthread_cond_t *__cond) __THROWNL
__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 condition 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 condition 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) __THROWNL __nonnull ((1));
/* Try to lock
spinlock LOCK. */ extern int pthread_spin_trylock (pthread_spinlock_t
*__lock) __THROWNL
__nonnull ((1)); /* Release spinlock LOCK. */ extern int
pthread_spin_unlock (pthread_spinlock_t
*__lock) __THROWNL __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) __THROWNL __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 */
---rony
------------------------------------------------------------------------------
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