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/* This is the POSIX thread API (POSIX 1003).
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* -------------------------------------------------------------
*
*
* Module: pthread.h
*
* Purpose:
* Provides an implementation of PThreads based upon the
* standard:
*
* POSIX 1003.1c-1995 (POSIX.1c)
*
* Authors:
* Contributors are listed in the file "MAINTAINERS".
*
* The following functions are implemented:
* ---------------------------
* PThreads
* ---------------------------
* pthread_attr_init
* pthread_attr_destroy
* pthread_attr_getdetachstate
* pthread_attr_getstackaddr
* pthread_attr_getstacksize
* pthread_attr_setdetachstate
* pthread_attr_setstackaddr
* pthread_attr_setstacksize
*
* pthread_create
* pthread_detach
* pthread_equal
* pthread_exit
* pthread_join
* pthread_self
* sched_yield
*
* pthread_cancel
* pthread_cleanup_pop
* pthread_cleanup_push
* pthread_setcancelstate
* pthread_setcanceltype
* pthread_testcancel
*
* ---------------------------
* Thread Specific Data
* ---------------------------
* pthread_key_create
* pthread_key_delete
* pthread_setspecific
* pthread_getspecific
*
* ---------------------------
* Mutexes
* ---------------------------
* pthread_mutexattr_init
* pthread_mutexattr_destroy
* pthread_mutexattr_getpshared
* pthread_mutexattr_setpshared
*
* pthread_mutex_init
* pthread_mutex_destroy
* pthread_mutex_lock
* pthread_mutex_trylock
* pthread_mutex_unlock
*
* ---------------------------
* Condition Variables
* ---------------------------
* pthread_condattr_init
* pthread_condattr_destroy
* pthread_condattr_getpshared
* pthread_condattr_setpshared
*
* pthread_cond_init
* pthread_cond_destroy
* pthread_cond_wait
* pthread_cond_timedwait
* pthread_cond_signal
* pthread_cond_broadcast
*
* ---------------------------
* Protected Methods
* ---------------------------
* pthreadCancelableWait
*
* ---------------------------
* RealTime Scheduling:
* ---------------------------
* pthread_attr_getschedparam
* pthread_attr_setschedparam
* pthread_getschedparam
* pthread_setschedparam
* sched_get_priority_max
* sched_get_priority_min
*
* ---------------------------
* Signals:
* ---------------------------
* pthread_sigmask
*
* Limitations
* ===========
* The following functions are not implemented:
*
* ---------------------------
* RealTime Scheduling:
* ---------------------------
* pthread_attr_getinheritsched
* pthread_attr_getschedpolicy
* pthread_attr_getscope
* pthread_attr_setinheritsched
* pthread_attr_setschedpolicy
* pthread_attr_setscope
* pthread_mutex_getprioceiling
* pthread_mutex_setprioceiling
* pthread_mutex_attr_getprioceiling
* pthread_mutex_attr_getprotocol
* pthread_mutex_attr_setprioceiling
* pthread_mutex_attr_setprotocol
*
* ---------------------------
* Fork Handlers:
* ---------------------------
* pthread_atfork
*
* ---------------------------
* Stdio:
* ---------------------------
* flockfile
* ftrylockfile
* funlockfile
* getc_unlocked
* getchar_unlocked
* putc_unlocked
* putchar_unlocked
*
* ---------------------------
* Thread-Safe C Runtime Library:
* ---------------------------
* readdir_r
* getgrgid_r
* getgrnam_r
* getpwuid_r
* getpwnam_r
*
* ---------------------------
* Signals:
* ---------------------------
* pthread_kill
* sigtimedwait
* sigwait
* sigwaitinfo
*
*
* -------------------------------------------------------------
*/
#if !defined( PTHREAD_H )
#define PTHREAD_H
#ifdef _WIN32
/*
* Disable following warnings when including Windows headers
*
* warning C4115: named type definition in parentheses
* warning C4116: unnamed type definition in parentheses
* warning C4127: conditional expression is constant
* warning C4201: nonstandard extension used : nameless struct/union
* warning C4214: nonstandard extension used : bit field types other than int
* warning C4514: unreferenced inline function has been removed
*/
#pragma warning( disable : 4115 4116 4127 4201 4214 4514)
#endif
/*
* -----------------
* autoconf switches
* -----------------
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <windows.h>
#include <time.h>
#if HAVE_SIGNAL_H
#include <signal.h>
#endif /* HAVE_SIGNAL_H */
#ifndef HAVE_STRUCT_TIMESPEC
struct timespec {
int tv_sec;
int tv_nsec;
};
#endif /* HAVE_STRUCT_TIMESPEC */
#ifndef SIG_BLOCK
#define SIG_BLOCK 0
#endif /* SIG_BLOCK */
#ifndef SIG_UNBLOCK
#define SIG_UNBLOCK 1
#endif /* SIG_UNBLOCK */
#ifndef SIG_SETMASK
#define SIG_SETMASK 2
#endif /* SIG_SETMASK */
#include <process.h>
#include <errno.h>
#ifdef _WIN32
/*
* Re-enable all but 4127, 4514
*/
#pragma warning( default : 4115 4116 4201 4214)
#endif
#if !defined( TRUE )
#define TRUE !FALSE
#define FALSE 0
#endif /* !TRUE */
#include <semaphore.h>
/* #include <sched.h> /**/
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/*
* -------------------------------------------------------------
*
* POSIX 1003.1c-1995 Options
* ===========================
*
* _POSIX_SEMAPHORES
* Semaphores come from POSIX.1b (POSIX 1003.1b-1993)
* rather than from PThreads. This macro indicates
* that POSIX Semaphores are supported:
* sem_destroy
* sem_init
* sem_wait
* sem_trywait
* sem_post
*
* _POSIX_THREADS (set)
* If set, you can use threads
*
* _POSIX_THREAD_ATTR_STACKSIZE (set)
* If set, you can control the size of a thread's
* stack
* pthread_attr_getstacksize
* pthread_attr_setstacksize
*
* _POSIX_THREAD_ATTR_STACKADDR (not set)
* If set, you can allocate and control a thread's
* stack. If not supported, the following functions
* will return ENOSYS, indicating they are not
* supported:
* pthread_attr_getstackaddr
* pthread_attr_setstackaddr
*
* _POSIX_THREAD_PRIORITY_SCHEDULING (not set)
* If set, you can use realtime scheduling.
* Indicates the availability of:
* pthread_attr_getinheritsched
* pthread_attr_getschedparam
* pthread_attr_getschedpolicy
* pthread_attr_getscope
* pthread_attr_setinheritsched
* pthread_attr_setschedparam
* pthread_attr_setschedpolicy
* pthread_attr_setscope
* pthread_getschedparam
* pthread_setschedparam
* pthread_get_priority_max
* pthread_get_priority_min
*
* _POSIX_THREAD_PRIO_INHERIT (not set)
* If set, you can create priority inheritance
* mutexes.
* pthread_mutexattr_getprotocol +
* pthread_mutexattr_setprotocol +
*
* _POSIX_THREAD_PRIO_PROTECT (not set)
* If set, you can create priority ceiling mutexes
* Indicates the availability of:
* pthread_mutex_getprioceiling
* pthread_mutex_setprioceiling
* pthread_mutexattr_getprioceiling
* pthread_mutexattr_getprotocol +
* pthread_mutexattr_setprioceiling
* pthread_mutexattr_setprotocol +
*
* _POSIX_THREAD_PROCESS_SHARED (not set)
* If set, you can create mutexes and condition
* variables that can be shared with another
* process.If set, indicates the availability
* of:
* pthread_mutexattr_getpshared
* pthread_mutexattr_setpshared
* pthread_condattr_getpshared
* pthread_condattr_setpshared
*
* _POSIX_THREAD_SAFE_FUNCTIONS (set)
* If set you can use the special *_r library
* functions that provide thread-safe behaviour
*
* + These functions provide both 'inherit' and/or
* 'protect' protocol, based upon these macro
* settings.
*
* POSIX 1003.1c-1995 Limits
* ===========================
*
* PTHREAD_DESTRUCTOR_ITERATIONS
* Maximum number of attempts to destroy
* a thread's thread-specific data on
* termination (must be at least 4)
*
* PTHREAD_KEYS_MAX
* Maximum number of thread-specific data keys
* available per process (must be at least 128)
*
* PTHREAD_STACK_MIN
* Minimum supported stack size for a thread
*
* PTHREAD_THREADS_MAX
* Maximum number of threads supported per
* process (must be at least 64).
*
* -------------------------------------------------------------
*/
/*
* POSIX Options
*/
#define _POSIX_THREADS
#define _POSIX_SEMAPHORES
#define _POSIX_THREAD_SAFE_FUNCTIONS
#define _POSIX_THREAD_ATTR_STACKSIZE
#if defined( KLUDGE )
/*
* The following are not supported
*/
#define _POSIX_THREAD_ATTR_STACKADDR
#define _POSIX_THREAD_PRIORITY_SCHEDULING
#define _POSIX_THREAD_PRIO_INHERIT
#define _POSIX_THREAD_PRIO_PROTECT
#define _POSIX_THREAD_PROCESS_SHARED
#endif /* KLUDGE */
/*
* POSIX Limits
*
* PTHREAD_DESTRUCTOR_ITERATIONS
* Standard states this must be at least
* 4.
*
* PTHREAD_KEYS_MAX
* WIN32 permits only 64 TLS keys per process.
* This limitation could be worked around by
* simply simulating keys.
*
* PTHREADS_STACK_MIN
* artibrarily chose 1K. By default, WIN32
* selects 1Meg stacks.
*
* PTHREAD_THREADS_MAX
* Not documented by WIN32. Wrote a test program
* that kept creating threads until it failed
* revealed this approximate number.
*
*/
#define PTHREAD_DESTRUCTOR_ITERATIONS 4
#define PTHREAD_KEYS_MAX 64
#define PTHREAD_STACK_MIN 1024
#define PTHREAD_THREADS_MAX 2019
typedef struct pthread_t_ *pthread_t;
typedef struct pthread_attr_t_ *pthread_attr_t;
typedef struct pthread_once_t_ pthread_once_t;
typedef struct pthread_key_t_ *pthread_key_t;
typedef struct pthread_mutex_t_ pthread_mutex_t;
typedef struct pthread_mutexattr_t_ pthread_mutexattr_t;
typedef struct pthread_cond_t_ *pthread_cond_t;
typedef struct pthread_condattr_t_ *pthread_condattr_t;
/*
* ====================
* ====================
* POSIX Threads
* ====================
* ====================
*/
/*
* pthread_attr_{get,set}detachstate
*/
#define PTHREAD_CREATE_JOINABLE 0
#define PTHREAD_CREATE_DETACHED 1
/*
* pthread_attr{get,set}inheritsched
*/
#define PTHREAD_INHERIT_SCHED 0
#define PTHREAD_EXPLICIT_SCHED 1
/*
* pthread_setcancelstate paramters
*/
#define PTHREAD_CANCEL_ENABLE 0
#define PTHREAD_CANCEL_DISABLE 1
/*
* pthread_setcanceltype parameters
*/
#define PTHREAD_CANCEL_ASYNCHRONOUS 0
#define PTHREAD_CANCEL_DEFERRED 1
/*
* ====================
* ====================
* Mutex
* ====================
* ====================
*/
/* FIXME: Replace the NULL with a valid critical section initializer
* and then also change the 0 (first element) to 1.
*/
#define PTHREAD_MUTEX_INITIALIZER { 0, NULL }
/*
* pthread_mutexattr_{get,set}pshared
* pthread_condattr_{get,set}pshared
*/
#define PTHREAD_PROCESS_PRIVATE 0
#define PTHREAD_PROCESS_SHARED 1
/*
* ====================
* ====================
* Once Key
* ====================
* ====================
*/
#define PTHREAD_ONCE_INIT { 0, PTHREAD_MUTEX_INITIALIZER }
/*
* ====================
* ====================
* Condition Variable
* ====================
* ====================
*/
#define PTHREAD_COND_INITIALIZER { {0, 0}, 0, PTHREAD_MUTEX_INITIALIZER }
/*
* ====================
* ====================
* Opaque Structure Definitions
* ====================
* ====================
*/
typedef enum {
/*
* This enumeration represents the state of the thread;
* The thread is still "alive" if the numeric value of the
* state is greater or equal "PThreadStateRunning".
*/
PThreadStateInitial = 0, /* Thread not running */
PThreadStateRunning, /* Thread alive & kicking */
PThreadStateSuspended, /* Thread alive but suspended */
PThreadStateCanceling, /* Thread alive but and is */
/* in the process of terminating */
/* due to a cancellation request */
PThreadStateException, /* Thread alive but exiting */
/* due to an exception */
PThreadStateLast
}
PThreadState;
typedef enum {
/*
* This enumeration represents the reason why a thread has
* terminated/is terminating.
*/
PThreadDemisePeaceful = 0, /* Death due natural causes */
PThreadDemiseCancelled, /* Death due to user cancel */
PThreadDemiseException, /* Death due to unhandled */
/* exception */
PThreadDemiseNotDead /* I'm not dead! */
}
PThreadDemise;
struct pthread_t_ {
DWORD thread;
HANDLE threadH;
PThreadState state;
PThreadDemise demise;
void *exitStatus;
void *parms;
int detachState;
int cancelState;
int cancelType;
HANDLE cancelEvent;
int implicit:1;
void *keys;
};
/*
* Special value to mark attribute objects as valid.
*/
#define _PTHREAD_ATTR_VALID 0xC4C0FFEE
struct pthread_attr_t_ {
long valid;
void *stackaddr;
size_t stacksize;
int detachstate;
int priority;
#if HAVE_SIGSET_T
sigset_t sigmask;
#endif /* HAVE_SIGSET_T */
};
struct pthread_mutex_t_ {
int valid;
CRITICAL_SECTION cs;
};
struct pthread_mutexattr_t_ {
int pshared;
};
struct pthread_key_t_ {
DWORD key;
void (*destructor) (void *);
pthread_mutex_t threadsLock;
void *threads;
};
struct pthread_cond_t_ {
long waiters; /* # waiting threads */
pthread_mutex_t waitersLock; /* Mutex that guards access to
waiter count */
sem_t sema; /* Queue up threads waiting for the
condition to become signaled */
HANDLE waitersDone; /* An auto reset event used by the
broadcast/signal thread to wait
for the waiting thread(s) to wake
up and get a chance at the
semaphore */
int wasBroadcast; /* keeps track if we are signaling
or broadcasting */
};
struct pthread_condattr_t_ {
int pshared;
};
struct pthread_once_t_ {
unsigned short flag;
pthread_mutex_t lock;
};
/*
* ====================
* ====================
* Scheduling
* ====================
* ====================
*/
/* Thread scheduling policies */
#define SCHED_OTHER 0
#define SCHED_FIFO 1
#define SCHED_RR 2
#define SCHED_MIN SCHED_OTHER
#define SCHED_MAX SCHED_RR
struct sched_param {
int sched_priority;
};
/* There are three implementations of cancel cleanup.
*
* C
* C++ (as per Cygwin32 or Mingw32)
* WIN32 SEH or C++
*/
typedef struct _pthread_cleanup_t _pthread_cleanup_t;
struct _pthread_cleanup_t
{
void (*routine) (void *);
void *arg;
#if !defined(__cplusplus)
_pthread_cleanup_t *prev;
#endif
};
#ifndef __cplusplus
/*
* C implementation of PThreads cancel cleanup
*/
#define pthread_cleanup_push( _rout, _arg ) \
{ \
_pthread_cleanup_t _cleanup; \
\
_pthread_push_cleanup( &_cleanup, (_rout), (_arg) ); \
#define pthread_cleanup_pop( _execute ) \
(void) _pthread_pop_cleanup( _execute ); \
}
#else /* !__cplusplus */
#ifdef _WIN32
/*
* WIN32 SEH version of cancel cleanup.
*/
#define pthread_cleanup_push( _rout, _arg ) \
{ \
_pthread_cleanup_t _cleanup; \
\
_cleanup.routine = (_rout); \
_cleanup.arg = (_arg); \
__try \
{ \
#define pthread_cleanup_pop( _execute ) \
} \
__finally \
{ \
if( _execute || AbnormalTermination()) \
{ \
(*(_cleanup.routine))( _cleanup.arg ); \
} \
} \
}
#else /* _WIN32 */
/*
* C++ (ie. Cygwin32 or Mingw32) version of cancel cleanup.
*
* Emulate try-finally behaviour.
*/
#define pthread_cleanup_push( _rout, _arg ) \
{ \
_pthread_cleanup_t _cleanup; \
\
_cleanup.routine = (_rout); \
_cleanup.arg = (_arg); \
try \
{ \
#define pthread_cleanup_pop( _execute ) \
} \
catch(...) \
{ \
(*(_cleanup.routine))( _cleanup.arg ); \
\
throw; \
} \
\
if (_execute) \
{ \
(*(_cleanup.routine))( _cleanup.arg ); \
} \
}
#endif /* _WIN32 */
#endif /* !__cplusplus */
/*
* ===============
* ===============
* Methods
* ===============
* ===============
*/
/*
* PThread Attribute Functions
*/
int pthread_attr_init (pthread_attr_t * attr);
int pthread_attr_destroy (pthread_attr_t * attr);
int pthread_attr_getdetachstate (const pthread_attr_t * attr,
int *detachstate);
int pthread_attr_getstackaddr (const pthread_attr_t * attr,
void **stackaddr);
int pthread_attr_getstacksize (const pthread_attr_t * attr,
size_t * stacksize);
int pthread_attr_setdetachstate (pthread_attr_t * attr,
int detachstate);
int pthread_attr_setstackaddr (pthread_attr_t * attr,
void *stackaddr);
int pthread_attr_setstacksize (pthread_attr_t * attr,
size_t stacksize);
/*
* PThread Functions
*/
int pthread_create (pthread_t * tid,
const pthread_attr_t * attr,
void *(*start) (void *),
void *arg);
int pthread_detach (pthread_t tid);
int pthread_equal (pthread_t t1,
pthread_t t2);
int pthread_exit (void *value_ptr);
int pthread_join (pthread_t thread,
void **value_ptr);
pthread_t pthread_self (void);
int pthread_cancel (pthread_t thread);
#ifndef __cplusplus
_pthread_cleanup_t *_pthread_pop_cleanup (int execute);
void _pthread_push_cleanup (_pthread_cleanup_t * cleanup,
void (*routine) (void *),
void *arg);
#endif /* !__cplusplus */
int pthread_setcancelstate (int state,
int *oldstate);
int pthread_setcanceltype (int type,
int *oldtype);
void pthread_testcancel (void);
int pthread_once (pthread_once_t * once_control,
void (*init_routine) (void));
/*
* Thread Specific Data Functions
*/
int pthread_key_create (pthread_key_t * key,
void (*destructor) (void *));
int pthread_key_delete (pthread_key_t key);
int pthread_setspecific (pthread_key_t key,
const void *value);
void *pthread_getspecific (pthread_key_t key);
/*
* Mutex Attribute Functions
*/
int pthread_mutexattr_init (pthread_mutexattr_t * attr);
int pthread_mutexattr_destroy (pthread_mutexattr_t * attr);
int pthread_mutexattr_getpshared (const pthread_mutexattr_t
* attr,
int *pshared);
int pthread_mutexattr_setpshared (pthread_mutexattr_t * attr,
int pshared);
/*
* Mutex Functions
*/
int pthread_mutex_init (pthread_mutex_t * mutex,
const pthread_mutexattr_t * attr);
int pthread_mutex_destroy (pthread_mutex_t * mutex);
int pthread_mutex_lock (pthread_mutex_t * mutex);
int pthread_mutex_trylock (pthread_mutex_t * mutex);
int pthread_mutex_unlock (pthread_mutex_t * mutex);
/*
* Condition Variable Attribute Functions
*/
int pthread_condattr_init (pthread_condattr_t * attr);
int pthread_condattr_destroy (pthread_condattr_t * attr);
int pthread_condattr_getpshared (const pthread_condattr_t * attr,
int *pshared);
int pthread_condattr_setpshared (pthread_condattr_t * attr,
int pshared);
/*
* Condition Variable Functions
*/
int pthread_cond_init (pthread_cond_t * cond,
const pthread_condattr_t * attr);
int pthread_cond_destroy (pthread_cond_t * cond);
int pthread_cond_wait (pthread_cond_t * cond,
pthread_mutex_t * mutex);
int pthread_cond_timedwait (pthread_cond_t * cond,
pthread_mutex_t * mutex,
const struct timespec *abstime);
int pthread_cond_signal (pthread_cond_t * cond);
int pthread_cond_broadcast (pthread_cond_t * cond);
/*
* Scheduling
*/
int pthread_setschedparam (pthread_t thread,
int policy,
const struct sched_param *param);
int pthread_getschedparam (pthread_t thread,
int *policy,
struct sched_param *param);
int sched_get_priority_min (int policy);
int sched_get_priority_max (int policy);
int pthread_attr_getschedparam (const pthread_attr_t *attr,
struct sched_param *param);
int pthread_attr_setschedparam (pthread_attr_t *attr,
const struct sched_param *param);
/*
* Protected Methods
*
* This function blocks until the given WIN32 handle
* is signaled or pthread_cancel had been called.
* This function allows the caller to hook into the
* PThreads cancel mechanism. It is implemented using
*
* WaitForMultipleObjects
*
* on 'waitHandle' and a manually reset WIN32 Event
* used to implement pthread_cancel.
*/
int pthreadCancelableWait (HANDLE waitHandle);
/*
* Thread-Safe C Runtime Library Mappings
* WIN32 C runtime library had been made thread-safe
* without affecting the user interface. Provide
* mappings from the UNIX thread-safe versions to
* the standard C runtime library calls.
* Only provide function mappings for functions that
* actually exist on WIN32.
*/
#define strtok_r( _s, _sep, _lasts ) \
( *(_lasts) = strtok( (_s), (_sep) ) )
#define asctime_r( _tm, _buf ) \
( strcpy( (_buf), asctime( (_tm) ) ), \
(_buf) )
#define ctime_r( _clock, _buf ) \
( strcpy( (_buf), ctime( (_tm) ) ), \
(_buf) )
#define gmtime_r( _clock, _result ) \
( *(_result) = *gmtime( (_clock) ), \
(_result) )
#define localtime_r( _clock, _result ) \
( *(_result) = *localtime( (_clock) ), \
(_result) )
#define rand_r( _seed ) \
rand()
#ifdef __cplusplus
} /* End of extern "C" */
#endif /* __cplusplus */
#endif /* PTHREAD_H */

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