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#include <bh/internal/thread.h>
#include <string.h>
#include <stdlib.h>
static void *bh_thread_run(void *arg)
{
bh_task_t *task;
task = (bh_task_t *)arg;
task->func(task->data);
task->flags |= BH_THREAD_DONE;
if (task->flags & BH_THREAD_CLEANUP)
bh_task_free(task);
return NULL;
}
int bh_thread_init(bh_thread_t *thread,
bh_task_t *task)
{
thread->allocated = 0;
return pthread_create(&thread->handle, NULL, bh_thread_run, task);
}
bh_thread_t *bh_thread_new(bh_task_t *task)
{
bh_thread_t *result;
result = malloc(sizeof(*result));
if (result && bh_thread_init(result, task))
{
free(result);
result = NULL;
}
if (result)
result->allocated = 1;
return result;
}
int bh_thread_join(bh_thread_t *thread)
{
int result = pthread_join(thread->handle, NULL);
if (thread->allocated)
free(thread);
return result;
}
int bh_thread_detach(bh_thread_t *thread)
{
int result = pthread_detach(thread->handle);
if (thread->allocated)
free(thread);
return result;
}
int bh_mutex_init(bh_mutex_t *mutex)
{
return pthread_mutex_init(&mutex->handle, NULL);
}
void bh_mutex_destroy(bh_mutex_t *mutex)
{
pthread_mutex_destroy(&mutex->handle);
}
int bh_mutex_lock(bh_mutex_t *mutex)
{
return pthread_mutex_lock(&mutex->handle);
}
int bh_mutex_try_lock(bh_mutex_t *mutex)
{
return pthread_mutex_trylock(&mutex->handle);
}
int bh_mutex_unlock(bh_mutex_t *mutex)
{
return pthread_mutex_unlock(&mutex->handle);
}
int bh_cond_init(bh_cond_t *cond)
{
return pthread_cond_init(&cond->handle, NULL);
}
void bh_cond_destroy(bh_cond_t *cond)
{
pthread_cond_destroy(&cond->handle);
}
int bh_cond_wait(bh_cond_t *cond,
bh_mutex_t *mutex)
{
return pthread_cond_wait(&cond->handle, &mutex->handle);
}
int bh_cond_wait_for(bh_cond_t *cond,
bh_mutex_t *mutex,
unsigned long timeout)
{
struct timespec ts;
ts.tv_sec = timeout / 1000;
ts.tv_nsec = (timeout - ts.tv_sec * 1000) * 1000000;
return pthread_cond_timedwait(&cond->handle, &mutex->handle, &ts);
}
int bh_cond_signal(bh_cond_t *cond)
{
return pthread_cond_signal(&cond->handle);
}
int bh_cond_broadcast(bh_cond_t *cond)
{
return pthread_cond_broadcast(&cond->handle);
}
int bh_thread_pool_init(bh_thread_pool_t *pool,
size_t size)
{
size_t i;
static bh_task_t pool_task;
static int pool_task_init = 0;
/* Initialize static thread pool task */
if (!pool_task_init)
{
bh_task_init(&pool_task, bh_thread_pool_worker, pool, 0);
pool_task_init = 1;
}
/* Zero out pool structure */
memset(pool, 0, sizeof(*pool));
/* Initialize mutex and condition variables */
if (bh_mutex_init(&pool->lock))
goto lock_fail;
if (bh_cond_init(&pool->new_task))
goto task_fail;
if (bh_cond_init(&pool->done_task))
goto done_fail;
/* Allocate array of threads */
pool->threads = malloc(size * sizeof(bh_thread_t));
pool->size = size;
if (!pool->threads)
goto thread_fail;
/* Initialize queue */
bh_queue_init(&pool->tasks);
if (bh_queue_reserve(&pool->tasks, 64))
goto queue_fail;
/* Initialize threads */
for (i = 0; i < size; i++)
{
if (bh_thread_init(&pool->threads[i], &pool_task))
{
pool->shutdown = 1;
bh_cond_broadcast(&pool->new_task);
for(; i; i--)
bh_thread_join(&pool->threads[i - 1]);
bh_queue_destroy(&pool->tasks);
goto queue_fail;
}
}
return 0;
queue_fail:
free(pool->threads);
thread_fail:
bh_cond_destroy(&pool->done_task);
done_fail:
bh_cond_destroy(&pool->new_task);
task_fail:
bh_mutex_destroy(&pool->lock);
lock_fail:
return -1;
}
bh_thread_pool_t *bh_thread_pool_new(size_t size)
{
bh_thread_pool_t *result;
result = malloc(sizeof(*result));
if (result && bh_thread_pool_init(result, size))
{
free(result);
result = NULL;
}
return result;
}
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