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Diffstat (limited to 'third-party/libuv/src/unix/threadpool.c')
-rw-r--r--third-party/libuv/src/unix/threadpool.c280
1 files changed, 0 insertions, 280 deletions
diff --git a/third-party/libuv/src/unix/threadpool.c b/third-party/libuv/src/unix/threadpool.c
deleted file mode 100644
index 7923250a09..0000000000
--- a/third-party/libuv/src/unix/threadpool.c
+++ /dev/null
@@ -1,280 +0,0 @@
-/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
- *
- * 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 "internal.h"
-#include <stdlib.h>
-
-#define MAX_THREADPOOL_SIZE 128
-
-static uv_once_t once = UV_ONCE_INIT;
-static uv_cond_t cond;
-static uv_mutex_t mutex;
-static unsigned int nthreads;
-static uv_thread_t* threads;
-static uv_thread_t default_threads[4];
-static QUEUE exit_message;
-static QUEUE wq;
-static volatile int initialized;
-
-
-static void uv__cancelled(struct uv__work* w) {
- abort();
-}
-
-
-/* To avoid deadlock with uv_cancel() it's crucial that the worker
- * never holds the global mutex and the loop-local mutex at the same time.
- */
-static void worker(void* arg) {
- struct uv__work* w;
- QUEUE* q;
-
- (void) arg;
-
- for (;;) {
- uv_mutex_lock(&mutex);
-
- while (QUEUE_EMPTY(&wq))
- uv_cond_wait(&cond, &mutex);
-
- q = QUEUE_HEAD(&wq);
-
- if (q == &exit_message)
- uv_cond_signal(&cond);
- else {
- QUEUE_REMOVE(q);
- QUEUE_INIT(q); /* Signal uv_cancel() that the work req is
- executing. */
- }
-
- uv_mutex_unlock(&mutex);
-
- if (q == &exit_message)
- break;
-
- w = QUEUE_DATA(q, struct uv__work, wq);
- w->work(w);
-
- uv_mutex_lock(&w->loop->wq_mutex);
- w->work = NULL; /* Signal uv_cancel() that the work req is done
- executing. */
- QUEUE_INSERT_TAIL(&w->loop->wq, &w->wq);
- uv_async_send(&w->loop->wq_async);
- uv_mutex_unlock(&w->loop->wq_mutex);
- }
-}
-
-
-static void post(QUEUE* q) {
- uv_mutex_lock(&mutex);
- QUEUE_INSERT_TAIL(&wq, q);
- uv_cond_signal(&cond);
- uv_mutex_unlock(&mutex);
-}
-
-
-static void init_once(void) {
- unsigned int i;
- const char* val;
-
- nthreads = ARRAY_SIZE(default_threads);
- val = getenv("UV_THREADPOOL_SIZE");
- if (val != NULL)
- nthreads = atoi(val);
- if (nthreads == 0)
- nthreads = 1;
- if (nthreads > MAX_THREADPOOL_SIZE)
- nthreads = MAX_THREADPOOL_SIZE;
-
- threads = default_threads;
- if (nthreads > ARRAY_SIZE(default_threads)) {
- threads = malloc(nthreads * sizeof(threads[0]));
- if (threads == NULL) {
- nthreads = ARRAY_SIZE(default_threads);
- threads = default_threads;
- }
- }
-
- if (uv_cond_init(&cond))
- abort();
-
- if (uv_mutex_init(&mutex))
- abort();
-
- QUEUE_INIT(&wq);
-
- for (i = 0; i < nthreads; i++)
- if (uv_thread_create(threads + i, worker, NULL))
- abort();
-
- initialized = 1;
-}
-
-
-UV_DESTRUCTOR(static void cleanup(void)) {
- unsigned int i;
-
- if (initialized == 0)
- return;
-
- post(&exit_message);
-
- for (i = 0; i < nthreads; i++)
- if (uv_thread_join(threads + i))
- abort();
-
- if (threads != default_threads)
- free(threads);
-
- uv_mutex_destroy(&mutex);
- uv_cond_destroy(&cond);
-
- threads = NULL;
- nthreads = 0;
- initialized = 0;
-}
-
-
-void uv__work_submit(uv_loop_t* loop,
- struct uv__work* w,
- void (*work)(struct uv__work* w),
- void (*done)(struct uv__work* w, int status)) {
- uv_once(&once, init_once);
- w->loop = loop;
- w->work = work;
- w->done = done;
- post(&w->wq);
-}
-
-
-static int uv__work_cancel(uv_loop_t* loop, uv_req_t* req, struct uv__work* w) {
- int cancelled;
-
- uv_mutex_lock(&mutex);
- uv_mutex_lock(&w->loop->wq_mutex);
-
- cancelled = !QUEUE_EMPTY(&w->wq) && w->work != NULL;
- if (cancelled)
- QUEUE_REMOVE(&w->wq);
-
- uv_mutex_unlock(&w->loop->wq_mutex);
- uv_mutex_unlock(&mutex);
-
- if (!cancelled)
- return -EBUSY;
-
- w->work = uv__cancelled;
- uv_mutex_lock(&loop->wq_mutex);
- QUEUE_INSERT_TAIL(&loop->wq, &w->wq);
- uv_async_send(&loop->wq_async);
- uv_mutex_unlock(&loop->wq_mutex);
-
- return 0;
-}
-
-
-void uv__work_done(uv_async_t* handle, int status) {
- struct uv__work* w;
- uv_loop_t* loop;
- QUEUE* q;
- QUEUE wq;
- int err;
-
- loop = container_of(handle, uv_loop_t, wq_async);
- QUEUE_INIT(&wq);
-
- uv_mutex_lock(&loop->wq_mutex);
- if (!QUEUE_EMPTY(&loop->wq)) {
- q = QUEUE_HEAD(&loop->wq);
- QUEUE_SPLIT(&loop->wq, q, &wq);
- }
- uv_mutex_unlock(&loop->wq_mutex);
-
- while (!QUEUE_EMPTY(&wq)) {
- q = QUEUE_HEAD(&wq);
- QUEUE_REMOVE(q);
-
- w = container_of(q, struct uv__work, wq);
- err = (w->work == uv__cancelled) ? -ECANCELED : 0;
- w->done(w, err);
- }
-}
-
-
-static void uv__queue_work(struct uv__work* w) {
- uv_work_t* req = container_of(w, uv_work_t, work_req);
-
- req->work_cb(req);
-}
-
-
-static void uv__queue_done(struct uv__work* w, int err) {
- uv_work_t* req;
-
- req = container_of(w, uv_work_t, work_req);
- uv__req_unregister(req->loop, req);
-
- if (req->after_work_cb == NULL)
- return;
-
- req->after_work_cb(req, err);
-}
-
-
-int uv_queue_work(uv_loop_t* loop,
- uv_work_t* req,
- uv_work_cb work_cb,
- uv_after_work_cb after_work_cb) {
- if (work_cb == NULL)
- return -EINVAL;
-
- uv__req_init(loop, req, UV_WORK);
- req->loop = loop;
- req->work_cb = work_cb;
- req->after_work_cb = after_work_cb;
- uv__work_submit(loop, &req->work_req, uv__queue_work, uv__queue_done);
- return 0;
-}
-
-
-int uv_cancel(uv_req_t* req) {
- struct uv__work* wreq;
- uv_loop_t* loop;
-
- switch (req->type) {
- case UV_FS:
- loop = ((uv_fs_t*) req)->loop;
- wreq = &((uv_fs_t*) req)->work_req;
- break;
- case UV_GETADDRINFO:
- loop = ((uv_getaddrinfo_t*) req)->loop;
- wreq = &((uv_getaddrinfo_t*) req)->work_req;
- break;
- case UV_WORK:
- loop = ((uv_work_t*) req)->loop;
- wreq = &((uv_work_t*) req)->work_req;
- break;
- default:
- return -EINVAL;
- }
-
- return uv__work_cancel(loop, req, wreq);
-}
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