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/*
* The MIT License
*
* Copyright (C) 2016 Alexander Saprykin <saprykin.spb@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* 'Software'), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "pmem.h"
#include "prwlock.h"
#include <stdlib.h>
#include <pthread.h>
typedef pthread_rwlock_t rwlock_hdl;
struct PRWLock_ {
rwlock_hdl hdl;
};
static pboolean pp_rwlock_unlock_any (PRWLock *lock);
static pboolean
pp_rwlock_unlock_any (PRWLock *lock)
{
if (P_UNLIKELY (lock == NULL))
return FALSE;
if (P_LIKELY (pthread_rwlock_unlock (&lock->hdl) == 0))
return TRUE;
else {
P_ERROR ("PRWLock::pp_rwlock_unlock_any: pthread_rwlock_unlock() failed");
return FALSE;
}
}
P_LIB_API PRWLock *
p_rwlock_new (void)
{
PRWLock *ret;
if (P_UNLIKELY ((ret = p_malloc0 (sizeof (PRWLock))) == NULL)) {
P_ERROR ("PRWLock::p_rwlock_new: failed to allocate memory");
return NULL;
}
if (P_UNLIKELY (pthread_rwlock_init (&ret->hdl, NULL) != 0)) {
P_ERROR ("PRWLock::p_rwlock_new: pthread_rwlock_init() failed");
p_free (ret);
return NULL;
}
return ret;
}
P_LIB_API pboolean
p_rwlock_reader_lock (PRWLock *lock)
{
if (P_UNLIKELY (lock == NULL))
return FALSE;
if (P_UNLIKELY (pthread_rwlock_rdlock (&lock->hdl) == 0))
return TRUE;
else {
P_ERROR ("PRWLock::p_rwlock_reader_lock: pthread_rwlock_rdlock() failed");
return FALSE;
}
}
P_LIB_API pboolean
p_rwlock_reader_trylock (PRWLock *lock)
{
if (P_UNLIKELY (lock == NULL))
return FALSE;
return (pthread_rwlock_tryrdlock (&lock->hdl) == 0) ? TRUE : FALSE;
}
P_LIB_API pboolean
p_rwlock_reader_unlock (PRWLock *lock)
{
return pp_rwlock_unlock_any (lock);
}
P_LIB_API pboolean
p_rwlock_writer_lock (PRWLock *lock)
{
if (P_UNLIKELY (lock == NULL))
return FALSE;
if (P_UNLIKELY (pthread_rwlock_wrlock (&lock->hdl) == 0))
return TRUE;
else {
P_ERROR ("PRWLock::p_rwlock_writer_lock: pthread_rwlock_wrlock() failed");
return FALSE;
}
}
P_LIB_API pboolean
p_rwlock_writer_trylock (PRWLock *lock)
{
if (P_UNLIKELY (lock == NULL))
return FALSE;
return (pthread_rwlock_trywrlock (&lock->hdl) == 0) ? TRUE : FALSE;
}
P_LIB_API pboolean
p_rwlock_writer_unlock (PRWLock *lock)
{
return pp_rwlock_unlock_any (lock);
}
P_LIB_API void
p_rwlock_free (PRWLock *lock)
{
if (P_UNLIKELY (lock == NULL))
return;
if (P_UNLIKELY (pthread_rwlock_destroy (&lock->hdl) != 0))
P_ERROR ("PRWLock::p_rwlock_free: pthread_rwlock_destroy() failed");
p_free (lock);
}
void
p_rwlock_init (void)
{
}
void
p_rwlock_shutdown (void)
{
}
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