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efl/src/lib/eina/eina_inline_lock_posix.x

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/* EINA - EFL data type library
* Copyright (C) 2011 Vincent Torri
*
* This 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.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library;
* if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef EINA_INLINE_LOCK_POSIX_X_
#define EINA_INLINE_LOCK_POSIX_X_
#ifdef _XOPEN_SOURCE
# define EINA_XOPEN_SOURCE _XOPEN_SOURCE
# undef _XOPEN_SOURCE
#endif
#define _XOPEN_SOURCE 600
#ifdef EINA_HAVE_POSIX_SPINLOCK
# include <sched.h>
#endif
#include <errno.h>
#ifndef __USE_UNIX98
# define __USE_UNIX98
# include <pthread.h>
# undef __USE_UNIX98
#else
# include <pthread.h>
#endif
#ifdef EINA_HAVE_OSX_SEMAPHORE
# include <mach/mach.h>
#endif
#include <semaphore.h>
#include <sys/time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#ifdef EINA_HAVE_DEBUG_THREADS
#include <assert.h>
#include <execinfo.h>
#define EINA_LOCK_DEBUG_BT_NUM 64
typedef void (*Eina_Lock_Bt_Func) ();
#include "eina_inlist.h"
#endif
EAPI void _eina_lock_debug_abort(int err, const char *fn, const volatile void *ptr);
EAPI void _eina_lock_debug_deadlock(const char *fn, const volatile void *ptr);
#define EINA_LOCK_ABORT_DEBUG(err, fn, ptr) \
_eina_lock_debug_abort(err, #fn, ptr)
#define EINA_LOCK_DEADLOCK_DEBUG(fn, ptr) \
_eina_lock_debug_deadlock(#fn, ptr)
/* For cond_timedwait */
#include <time.h>
#include <sys/time.h>
#include <eina_error.h>
typedef struct _Eina_Lock Eina_Lock;
typedef struct _Eina_RWLock Eina_RWLock;
typedef struct _Eina_Condition Eina_Condition;
typedef pthread_key_t Eina_TLS;
#if defined(EINA_HAVE_POSIX_SPINLOCK)
typedef pthread_spinlock_t Eina_Spinlock;
#elif defined(EINA_HAVE_OSX_SPINLOCK)
typedef uintptr_t Eina_Spinlock;
#else
typedef Eina_Lock Eina_Spinlock;
#endif
#if defined(EINA_HAVE_OSX_SEMAPHORE)
typedef semaphore_t Eina_Semaphore;
#else
typedef sem_t Eina_Semaphore;
#endif
EAPI void eina_lock_debug(const Eina_Lock *mutex);
/** @privatesection @{ */
struct _Eina_Lock
{
#ifdef EINA_HAVE_DEBUG_THREADS
EINA_INLIST; /**< Keeps track of the threads waiting for the lock */
#endif
pthread_mutex_t mutex; /**< The mutex that handles the locking */
#ifdef EINA_HAVE_DEBUG_THREADS
pthread_t lock_thread_id; /**< The ID of the thread that currently has the lock */
Eina_Lock_Bt_Func lock_bt[EINA_LOCK_DEBUG_BT_NUM]; /**< The function that will produce a backtrace on the thread that has the lock */
int lock_bt_num; /**< Number of addresses in the backtrace */
Eina_Bool locked : 1; /**< Indicates locked or not locked */
Eina_Bool recursive : 1; /**< Indicates recursive lock */
#endif
};
struct _Eina_Condition
{
Eina_Lock *lock; /**< The lock for this condition */
pthread_cond_t condition; /**< The condition variable */
#if defined(__clockid_t_defined)
clockid_t clkid; /**< The attached clock for timedwait */
#endif
};
struct _Eina_RWLock
{
pthread_rwlock_t mutex; /**< The mutex that handles the locking */
#ifdef EINA_HAVE_DEBUG_THREADS
pthread_t lock_thread_wid; /**< The ID of the thread that currently has the lock */
#endif
};
/** @} privatesection */
EAPI extern Eina_Bool _eina_threads_activated;
#ifdef EINA_HAVE_DEBUG_THREADS
EAPI extern int _eina_threads_debug;
EAPI extern pthread_t _eina_main_loop;
EAPI extern pthread_mutex_t _eina_tracking_lock;
EAPI extern Eina_Inlist *_eina_tracking;
#endif
EAPI Eina_Bool _eina_lock_new(Eina_Lock *mutex, Eina_Bool recursive);
EAPI void _eina_lock_free(Eina_Lock *mutex);
EAPI Eina_Bool _eina_condition_new(Eina_Condition *cond, Eina_Lock *mutex);
EAPI void _eina_condition_free(Eina_Condition *cond);
EAPI Eina_Bool _eina_rwlock_new(Eina_RWLock *mutex);
EAPI void _eina_rwlock_free(Eina_RWLock *mutex);
EAPI Eina_Bool _eina_spinlock_new(Eina_Spinlock *spinlock);
EAPI void _eina_spinlock_free(Eina_Spinlock *spinlock);
EAPI Eina_Bool _eina_semaphore_new(Eina_Semaphore *sem, int count_init);
EAPI Eina_Bool _eina_semaphore_free(Eina_Semaphore *sem);
#ifdef EINA_HAVE_OSX_SPINLOCK
EAPI Eina_Lock_Result _eina_spinlock_macos_take(Eina_Spinlock *spinlock);
EAPI Eina_Lock_Result _eina_spinlock_macos_take_try(Eina_Spinlock *spinlock);
EAPI Eina_Lock_Result _eina_spinlock_macos_release(Eina_Spinlock *spinlock);
#endif
static inline Eina_Bool
eina_lock_new(Eina_Lock *mutex)
{
Eina_Bool ret = _eina_lock_new(mutex, EINA_FALSE);
#ifdef EINA_HAVE_DEBUG_THREADS
mutex->recursive = EINA_FALSE;
mutex->lock_thread_id = 0;
mutex->lock_bt_num = 0;
mutex->locked = 0;
#endif
return ret;
}
static inline Eina_Bool
eina_lock_recursive_new(Eina_Lock *mutex)
{
Eina_Bool ret = _eina_lock_new(mutex, EINA_TRUE);
#ifdef EINA_HAVE_DEBUG_THREADS
mutex->recursive = EINA_TRUE;
mutex->lock_thread_id = 0;
mutex->lock_bt_num = 0;
mutex->locked = 0;
#endif
return ret;
}
static inline void
eina_lock_free(Eina_Lock *mutex)
{
#ifdef EINA_HAVE_DEBUG_THREADS
if (mutex->locked)
{
pthread_mutex_lock(&_eina_tracking_lock);
_eina_tracking = eina_inlist_remove(_eina_tracking,
EINA_INLIST_GET(mutex));
pthread_mutex_unlock(&_eina_tracking_lock);
}
#endif
_eina_lock_free(mutex);
}
static inline Eina_Lock_Result
eina_lock_take_try(Eina_Lock *mutex)
{
Eina_Lock_Result ret = EINA_LOCK_FAIL;
int ok;
#ifdef EINA_HAVE_ON_OFF_THREADS
if (!_eina_threads_activated)
{
return EINA_LOCK_SUCCEED;
}
#endif
ok = pthread_mutex_trylock(&(mutex->mutex));
if (ok == 0) ret = EINA_LOCK_SUCCEED;
else if (ok == EDEADLK)
{
eina_lock_debug(mutex);
ret = EINA_LOCK_DEADLOCK;
}
else if (ok != EBUSY) EINA_LOCK_ABORT_DEBUG(ok, trylock, mutex);
#ifdef EINA_HAVE_DEBUG_THREADS
if (ret == EINA_LOCK_SUCCEED)
{
/* recursive locks can't make use of any of this */
if (mutex->recursive) return ret;
mutex->locked = 1;
mutex->lock_thread_id = pthread_self();
/* backtrace() can somehow generate EINVAL even though this is not documented anywhere? */
int err = errno;
mutex->lock_bt_num = backtrace((void **)(mutex->lock_bt), EINA_LOCK_DEBUG_BT_NUM);
errno = err;
pthread_mutex_lock(&_eina_tracking_lock);
_eina_tracking = eina_inlist_append(_eina_tracking,
EINA_INLIST_GET(mutex));
pthread_mutex_unlock(&_eina_tracking_lock);
}
#endif
return ret;
}
static inline Eina_Lock_Result
eina_lock_take(Eina_Lock *mutex)
{
Eina_Lock_Result ret = EINA_LOCK_FAIL;
int ok;
#ifdef EINA_HAVE_ON_OFF_THREADS
if (!_eina_threads_activated)
{
return EINA_LOCK_SUCCEED;
}
#endif
#ifdef EINA_HAVE_DEBUG_THREADS
if (eina_lock_take_try(mutex) == EINA_LOCK_SUCCEED) return EINA_LOCK_SUCCEED;
#endif
#ifdef EINA_HAVE_DEBUG_THREADS
if (_eina_threads_debug >= 100)
{
struct timeval t0, t1;
int dt;
gettimeofday(&t0, NULL);
ok = pthread_mutex_lock(&(mutex->mutex));
gettimeofday(&t1, NULL);
dt = (t1.tv_sec - t0.tv_sec) * 1000000;
if (t1.tv_usec > t0.tv_usec)
dt += (t1.tv_usec - t0.tv_usec);
else
dt -= t0.tv_usec - t1.tv_usec;
if (dt > _eina_threads_debug) abort();
}
else
{
#endif
ok = pthread_mutex_lock(&(mutex->mutex));
#ifdef EINA_HAVE_DEBUG_THREADS
}
#endif
if (ok == 0) ret = EINA_LOCK_SUCCEED;
else if (ok == EDEADLK)
{
eina_lock_debug(mutex);
ret = EINA_LOCK_DEADLOCK;
#ifdef EINA_HAVE_DEBUG_THREADS
if (_eina_threads_debug) abort();
#endif
}
else EINA_LOCK_ABORT_DEBUG(ok, lock, mutex);
#ifdef EINA_HAVE_DEBUG_THREADS
/* recursive locks can't make use of any of this */
if (mutex->recursive) return ret;
mutex->locked = 1;
mutex->lock_thread_id = pthread_self();
/* backtrace() can somehow generate EINVAL even though this is not documented anywhere? */
int err = errno;
mutex->lock_bt_num = backtrace((void **)(mutex->lock_bt), EINA_LOCK_DEBUG_BT_NUM);
errno = err;
pthread_mutex_lock(&_eina_tracking_lock);
_eina_tracking = eina_inlist_append(_eina_tracking,
EINA_INLIST_GET(mutex));
pthread_mutex_unlock(&_eina_tracking_lock);
#endif
return ret;
}
static inline Eina_Lock_Result
eina_lock_release(Eina_Lock *mutex)
{
Eina_Lock_Result ret = EINA_LOCK_FAIL;
int ok;
#ifdef EINA_HAVE_ON_OFF_THREADS
if (!_eina_threads_activated)
{
return EINA_LOCK_SUCCEED;
}
#endif
#ifdef EINA_HAVE_DEBUG_THREADS
/* recursive locks can't make use of any of this */
if (!mutex->recursive)
{
mutex->locked = 0;
mutex->lock_thread_id = 0;
memset(mutex->lock_bt, 0, EINA_LOCK_DEBUG_BT_NUM * sizeof(Eina_Lock_Bt_Func));
mutex->lock_bt_num = 0;
pthread_mutex_lock(&_eina_tracking_lock);
_eina_tracking = eina_inlist_remove(_eina_tracking,
EINA_INLIST_GET(mutex));
pthread_mutex_unlock(&_eina_tracking_lock);
}
#endif
ok = pthread_mutex_unlock(&(mutex->mutex));
if (ok == 0) ret = EINA_LOCK_SUCCEED;
else if (ok == EPERM) ret = EINA_LOCK_FAIL;
else EINA_LOCK_ABORT_DEBUG(ok, unlock, mutex);
return ret;
}
static inline Eina_Bool
eina_condition_new(Eina_Condition *cond, Eina_Lock *mutex)
{
return _eina_condition_new(cond, mutex);
}
static inline void
eina_condition_free(Eina_Condition *cond)
{
_eina_condition_free(cond);
}
static inline Eina_Bool
eina_condition_wait(Eina_Condition *cond)
{
Eina_Bool r = EINA_FALSE;
int ok;
#ifdef EINA_HAVE_DEBUG_THREADS
assert(_eina_threads_activated);
assert(cond->lock != NULL);
pthread_mutex_lock(&_eina_tracking_lock);
_eina_tracking = eina_inlist_remove(_eina_tracking,
EINA_INLIST_GET(cond->lock));
pthread_mutex_unlock(&_eina_tracking_lock);
#endif
ok = pthread_cond_wait(&(cond->condition), &(cond->lock->mutex));
if (ok == 0) r = EINA_TRUE;
else if (ok == EPERM) r = EINA_FALSE;
else EINA_LOCK_ABORT_DEBUG(ok, cond_wait, cond);
#ifdef EINA_HAVE_DEBUG_THREADS
pthread_mutex_lock(&_eina_tracking_lock);
_eina_tracking = eina_inlist_append(_eina_tracking,
EINA_INLIST_GET(cond->lock));
pthread_mutex_unlock(&_eina_tracking_lock);
#endif
return r;
}
static inline Eina_Bool
eina_condition_timedwait(Eina_Condition *cond, double t)
{
struct timespec ts;
time_t sec;
long nsec;
int err;
Eina_Bool r = EINA_FALSE;
if (t >= 0.0)
{
#if defined(__clockid_t_defined)
if (cond->clkid)
{
if (clock_gettime(cond->clkid, &ts) != 0) return EINA_FALSE;
}
else
#endif
{
/* Obsolete for Linux.
* TODO: use pthread_cond_timedwait_relative_np for OSX. */
struct timeval tv;
if (gettimeofday(&tv, NULL) != 0) return EINA_FALSE;
ts.tv_sec = tv.tv_sec;
ts.tv_nsec = tv.tv_usec * 1000L;
}
#ifdef EINA_HAVE_DEBUG_THREADS
assert(_eina_threads_activated);
assert(cond->lock != NULL);
pthread_mutex_lock(&_eina_tracking_lock);
_eina_tracking = eina_inlist_remove(_eina_tracking,
EINA_INLIST_GET(cond->lock));
pthread_mutex_unlock(&_eina_tracking_lock);
#endif
sec = (time_t)t;
nsec = (t - (double)sec) * 1000000000L;
ts.tv_sec += sec;
ts.tv_nsec += nsec;
if (ts.tv_nsec > 1000000000L)
{
ts.tv_sec++;
ts.tv_nsec -= 1000000000L;
}
err = pthread_cond_timedwait(&(cond->condition),
&(cond->lock->mutex),
&ts);
if (err == 0) r = EINA_TRUE;
else if (err == EPERM) eina_error_set(EPERM);
else if (err == ETIMEDOUT) eina_error_set(ETIMEDOUT);
else EINA_LOCK_ABORT_DEBUG(err, cond_timedwait, cond);
#ifdef EINA_HAVE_DEBUG_THREADS
pthread_mutex_lock(&_eina_tracking_lock);
_eina_tracking = eina_inlist_append(_eina_tracking,
EINA_INLIST_GET(cond->lock));
pthread_mutex_unlock(&_eina_tracking_lock);
#endif
}
errno = EINVAL;
return r;
}
static inline Eina_Bool
eina_condition_broadcast(Eina_Condition *cond)
{
int ok;
#ifdef EINA_HAVE_DEBUG_THREADS
assert(cond->lock != NULL);
#endif
ok = pthread_cond_broadcast(&(cond->condition));
if (ok == 0) return EINA_TRUE;
EINA_LOCK_ABORT_DEBUG(ok, cond_broadcast, cond);
return EINA_FALSE;
}
static inline Eina_Bool
eina_condition_signal(Eina_Condition *cond)
{
int ok;
#ifdef EINA_HAVE_DEBUG_THREADS
assert(cond->lock != NULL);
#endif
ok = pthread_cond_signal(&(cond->condition));
if (ok == 0) return EINA_TRUE;
EINA_LOCK_ABORT_DEBUG(ok, cond_signal, cond);
return EINA_FALSE;
}
static inline Eina_Bool
eina_rwlock_new(Eina_RWLock *mutex)
{
return _eina_rwlock_new(mutex);
}
static inline void
eina_rwlock_free(Eina_RWLock *mutex)
{
_eina_rwlock_free(mutex);
}
static inline Eina_Lock_Result
eina_rwlock_take_read(Eina_RWLock *mutex)
{
int ok;
#ifdef EINA_HAVE_ON_OFF_THREADS
if (!_eina_threads_activated)
{
return EINA_LOCK_SUCCEED;
}
#endif
ok = pthread_rwlock_rdlock(&(mutex->mutex));
if (ok == 0) return EINA_LOCK_SUCCEED;
else if (ok == EAGAIN || ok == ENOMEM) return EINA_LOCK_FAIL;
else if (ok == EDEADLK) EINA_LOCK_DEADLOCK_DEBUG(rwlock_rdlock, mutex);
else EINA_LOCK_ABORT_DEBUG(ok, rwlock_rdlock, mutex);
return EINA_LOCK_FAIL;
}
static inline Eina_Lock_Result
eina_rwlock_take_write(Eina_RWLock *mutex)
{
int ok;
#ifdef EINA_HAVE_ON_OFF_THREADS
if (!_eina_threads_activated)
{
return EINA_LOCK_SUCCEED;
}
#endif
ok = pthread_rwlock_wrlock(&(mutex->mutex));
if (ok == 0) return EINA_LOCK_SUCCEED;
else if (ok == ENOMEM) return EINA_LOCK_FAIL;
else if (ok == EDEADLK) EINA_LOCK_DEADLOCK_DEBUG(rwlock_wrlock, mutex);
else EINA_LOCK_ABORT_DEBUG(ok, rwlock_wrlock, mutex);
return EINA_LOCK_FAIL;
}
static inline Eina_Lock_Result
eina_rwlock_release(Eina_RWLock *mutex)
{
int ok;
#ifdef EINA_HAVE_ON_OFF_THREADS
if (!_eina_threads_activated)
{
return EINA_LOCK_SUCCEED;
}
#endif
ok = pthread_rwlock_unlock(&(mutex->mutex));
if (ok == 0) return EINA_LOCK_SUCCEED;
else if (ok == EPERM) return EINA_LOCK_FAIL;
else EINA_LOCK_ABORT_DEBUG(ok, rwlock_unlock, mutex);
return EINA_LOCK_FAIL;
}
static inline Eina_Bool
eina_tls_cb_new(Eina_TLS *key, Eina_TLS_Delete_Cb delete_cb)
{
if (pthread_key_create(key, delete_cb) == 0) return EINA_TRUE;
return EINA_FALSE;
}
static inline Eina_Bool
eina_tls_new(Eina_TLS *key)
{
return eina_tls_cb_new(key, NULL);
}
static inline void
eina_tls_free(Eina_TLS key)
{
pthread_key_delete(key);
}
static inline void *
eina_tls_get(Eina_TLS key)
{
return pthread_getspecific(key);
}
static inline Eina_Bool
eina_tls_set(Eina_TLS key, const void *data)
{
if (pthread_setspecific(key, data) == 0) return EINA_TRUE;
return EINA_FALSE;
}
#ifdef EINA_HAVE_PTHREAD_BARRIER
typedef struct _Eina_Barrier Eina_Barrier;
struct _Eina_Barrier
{
pthread_barrier_t barrier;
};
static inline Eina_Bool
eina_barrier_wait(Eina_Barrier *barrier)
{
int ok = pthread_barrier_wait(&(barrier->barrier));
if (ok == 0) return EINA_TRUE;
else if (ok == PTHREAD_BARRIER_SERIAL_THREAD) return EINA_TRUE;
else EINA_LOCK_ABORT_DEBUG(ok, barrier_wait, barrier);
return EINA_TRUE;
}
#else
#include "eina_inline_lock_barrier.x"
#endif
EAPI Eina_Bool _eina_barrier_new(Eina_Barrier *barrier, int needed);
EAPI void _eina_barrier_free(Eina_Barrier *barrier);
static inline Eina_Bool
eina_barrier_new(Eina_Barrier *barrier, int needed)
{
return _eina_barrier_new(barrier, needed);
}
static inline void
eina_barrier_free(Eina_Barrier *barrier)
{
_eina_barrier_free(barrier);
}
static inline Eina_Bool
eina_spinlock_new(Eina_Spinlock *spinlock)
{
return _eina_spinlock_new(spinlock);
}
static inline void
eina_spinlock_free(Eina_Spinlock *spinlock)
{
_eina_spinlock_free(spinlock);
}
static inline Eina_Lock_Result
eina_spinlock_take_try(Eina_Spinlock *spinlock)
{
#if defined(EINA_HAVE_POSIX_SPINLOCK)
int t = pthread_spin_trylock(spinlock);
if (t == 0) return EINA_LOCK_SUCCEED;
else if (t == EBUSY) return EINA_LOCK_FAIL;
else EINA_LOCK_ABORT_DEBUG(t, spin_trylock, spinlock);
return EINA_LOCK_FAIL;
#elif defined(EINA_HAVE_OSX_SPINLOCK)
return _eina_spinlock_macos_take_try(spinlock);
#else
return eina_lock_take_try(spinlock);
#endif
}
static inline Eina_Lock_Result
eina_spinlock_take(Eina_Spinlock *spinlock)
{
#if defined(EINA_HAVE_POSIX_SPINLOCK)
int t;
#ifdef EINA_HAVE_DEBUG_THREADS
if (eina_spinlock_take_try(spinlock) == EINA_LOCK_SUCCEED) return EINA_LOCK_SUCCEED;
#endif
for (;;)
{
t = pthread_spin_lock(spinlock);
if (t == 0) break;
else EINA_LOCK_ABORT_DEBUG(t, spin_lock, spinlock);
}
return EINA_LOCK_SUCCEED;
#elif defined(EINA_HAVE_OSX_SPINLOCK)
return _eina_spinlock_macos_take(spinlock);
#else
return eina_lock_take(spinlock);
#endif
}
static inline Eina_Lock_Result
eina_spinlock_release(Eina_Spinlock *spinlock)
{
#if defined(EINA_HAVE_POSIX_SPINLOCK)
int ok = pthread_spin_unlock(spinlock);
if (ok == 0) return EINA_LOCK_SUCCEED;
else if (ok == EPERM) return EINA_LOCK_FAIL;
else EINA_LOCK_ABORT_DEBUG(ok, spin_unlock, spinlock);
return EINA_LOCK_FAIL;
#elif defined(EINA_HAVE_OSX_SPINLOCK)
return _eina_spinlock_macos_release(spinlock);
#else
return eina_lock_release(spinlock);
#endif
}
static inline Eina_Bool
eina_semaphore_new(Eina_Semaphore *sem, int count_init)
{
return _eina_semaphore_new(sem, count_init);
}
static inline Eina_Bool
eina_semaphore_free(Eina_Semaphore *sem)
{
return _eina_semaphore_free(sem);
}
static inline Eina_Bool
eina_semaphore_lock(Eina_Semaphore *sem)
{
if (sem)
{
for (;;)
{
if (
#if defined(EINA_HAVE_OSX_SEMAPHORE)
semaphore_wait(*sem)
#else
sem_wait(sem)
#endif
== 0)
return EINA_TRUE;
else if (errno != EINTR) goto err;
}
}
return EINA_FALSE;
err:
if (errno == EDEADLK) EINA_LOCK_DEADLOCK_DEBUG(sem_wait, sem);
return EINA_FALSE;
}
static inline Eina_Bool
eina_semaphore_release(Eina_Semaphore *sem, int count_release EINA_UNUSED)
{
if (sem)
#if defined(EINA_HAVE_OSX_SEMAPHORE)
return (semaphore_signal(*sem) == KERN_SUCCESS) ? EINA_TRUE : EINA_FALSE;
#else
return (sem_post(sem) == 0) ? EINA_TRUE : EINA_FALSE;
#endif
return EINA_FALSE;
}
#undef _XOPEN_SOURCE
// This is necessary to let third party still define this macro
#ifdef EINA_XOPEN_SOURCE
# define _XOPEN_SOURCE EINA_XOPEN_SOURCE
#endif
#endif
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