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/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#include <nxt_main.h>
static void nxt_job_thread_trampoline(nxt_task_t *task, void *obj, void *data);
static void nxt_job_thread_return_handler(nxt_task_t *task, void *obj,
void *data);
void *
nxt_job_create(nxt_mp_t *mp, size_t size)
{
size_t cache_size;
nxt_job_t *job;
if (mp == NULL) {
mp = nxt_mp_create(1024, 128, 256, 32);
if (nxt_slow_path(mp == NULL)) {
return NULL;
}
job = nxt_mp_zget(mp, size);
cache_size = 0;
} else {
job = nxt_mp_zalloc(mp, size);
cache_size = size;
}
if (nxt_fast_path(job != NULL)) {
job->cache_size = (uint16_t) cache_size;
job->mem_pool = mp;
nxt_job_set_name(job, "job");
}
/* Allow safe nxt_queue_remove() in nxt_job_destroy(). */
nxt_queue_self(&job->link);
return job;
}
void
nxt_job_init(nxt_job_t *job, size_t size)
{
nxt_memzero(job, size);
nxt_job_set_name(job, "job");
nxt_queue_self(&job->link);
}
void
nxt_job_destroy(nxt_task_t *task, void *data)
{
nxt_job_t *job;
job = data;
nxt_queue_remove(&job->link);
if (job->cache_size == 0) {
if (job->mem_pool != NULL) {
nxt_mp_destroy(job->mem_pool);
}
} else {
nxt_mp_free(job->mem_pool, job);
}
}
#if 0
nxt_int_t
nxt_job_cleanup_add(nxt_mp_t *mp, nxt_job_t *job)
{
nxt_mem_pool_cleanup_t *mpcl;
mpcl = nxt_mem_pool_cleanup(mp, 0);
if (nxt_fast_path(mpcl != NULL)) {
mpcl->handler = nxt_job_destroy;
mpcl->data = job;
return NXT_OK;
}
return NXT_ERROR;
}
#endif
/*
* The (void *) casts in nxt_thread_pool_post() and nxt_event_engine_post()
* calls and to the "nxt_work_handler_t" are required by Sun C.
*/
void
nxt_job_start(nxt_task_t *task, nxt_job_t *job, nxt_work_handler_t handler)
{
nxt_debug(task, "%s start", job->name);
if (job->thread_pool != NULL) {
nxt_int_t ret;
job->engine = task->thread->engine;
nxt_work_set(&job->work, nxt_job_thread_trampoline,
job->task, job, (void *) handler);
ret = nxt_thread_pool_post(job->thread_pool, &job->work);
if (ret == NXT_OK) {
return;
}
handler = job->abort_handler;
}
handler(job->task, job, job->data);
}
/* A trampoline function is called by a thread pool thread. */
static void
nxt_job_thread_trampoline(nxt_task_t *task, void *obj, void *data)
{
nxt_job_t *job;
nxt_work_handler_t handler;
job = obj;
handler = (nxt_work_handler_t) data;
nxt_debug(task, "%s thread", job->name);
if (nxt_slow_path(job->cancel)) {
nxt_job_return(task, job, job->abort_handler);
} else {
handler(job->task, job, job->data);
}
}
void
nxt_job_return(nxt_task_t *task, nxt_job_t *job, nxt_work_handler_t handler)
{
nxt_debug(task, "%s return", job->name);
if (job->engine != NULL) {
/* A return function is called in thread pool thread context. */
nxt_work_set(&job->work, nxt_job_thread_return_handler,
job->task, job, (void *) handler);
nxt_event_engine_post(job->engine, &job->work);
return;
}
if (nxt_slow_path(job->cancel)) {
nxt_debug(task, "%s cancellation", job->name);
handler = job->abort_handler;
}
nxt_work_queue_add(&task->thread->engine->fast_work_queue,
handler, job->task, job, job->data);
}
static void
nxt_job_thread_return_handler(nxt_task_t *task, void *obj, void *data)
{
nxt_job_t *job;
nxt_work_handler_t handler;
job = obj;
handler = (nxt_work_handler_t) data;
job->task->thread = task->thread;
if (nxt_slow_path(job->cancel)) {
nxt_debug(task, "%s cancellation", job->name);
handler = job->abort_handler;
}
handler(job->task, job, job->data);
}
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