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/* 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.
*/
/* Tests commented out with XXX are ones that are failing on Linux */
/*
* Purpose of this test is to check semantics of starting and stopping
* prepare, check and idle watchers.
*
* - A watcher must be able to safely stop or close itself;
* - Once a watcher is stopped or closed its callback should never be called.
* - If a watcher is closed, it is implicitly stopped and its close_cb should
* be called exactly once.
* - A watcher can safely start and stop other watchers of the same type.
* - Prepare and check watchers are called once per event loop iterations.
* - All active idle watchers are queued when the event loop has no more work
* to do. This is done repeatedly until all idle watchers are inactive.
* - If a watcher starts another watcher of the same type its callback is not
* immediately queued. For check and prepare watchers, that means that if
* a watcher makes another of the same type active, it'll not be called until
* the next event loop iteration. For idle. watchers this means that the
* newly activated idle watcher might not be queued immediately.
* - Prepare, check, idle watchers keep the event loop alive even when they're
* not active.
*
* This is what the test globally does:
*
* - prepare_1 is always active and counts event loop iterations. It also
* creates and starts prepare_2 every other iteration. Finally it verifies
* that no idle watchers are active before polling.
* - prepare_2 is started by prepare_1 every other iteration. It immediately
* stops itself. It verifies that a watcher is not queued immediately
* if created by another watcher of the same type.
* - There's a check watcher that stops the event loop after a certain number
* of iterations. It starts a varying number of idle_1 watchers.
* - Idle_1 watchers stop themselves after being called a few times. All idle_1
* watchers try to start the idle_2 watcher if it is not already started or
* awaiting its close callback.
* - The idle_2 watcher always exists but immediately closes itself after
* being started by a check_1 watcher. It verifies that a watcher is
* implicitly stopped when closed, and that a watcher can close itself
* safely.
* - There is a repeating timer. It does not keep the event loop alive
* (ev_unref) but makes sure that the loop keeps polling the system for
* events.
*/
#include "uv.h"
#include "task.h"
#include <math.h>
#define IDLE_COUNT 7
#define ITERATIONS 21
#define TIMEOUT 100
static uv_prepare_t prepare_1_handle;
static uv_prepare_t prepare_2_handle;
static uv_check_t check_handle;
static uv_idle_t idle_1_handles[IDLE_COUNT];
static uv_idle_t idle_2_handle;
static uv_timer_t timer_handle;
static int loop_iteration = 0;
static int prepare_1_cb_called = 0;
static int prepare_1_close_cb_called = 0;
static int prepare_2_cb_called = 0;
static int prepare_2_close_cb_called = 0;
static int check_cb_called = 0;
static int check_close_cb_called = 0;
static int idle_1_cb_called = 0;
static int idle_1_close_cb_called = 0;
static int idles_1_active = 0;
static int idle_2_cb_called = 0;
static int idle_2_close_cb_called = 0;
static int idle_2_cb_started = 0;
static int idle_2_is_active = 0;
static void timer_cb(uv_timer_t* handle, int status) {
ASSERT(handle == &timer_handle);
ASSERT(status == 0);
}
static void idle_2_close_cb(uv_handle_t* handle) {
LOG("IDLE_2_CLOSE_CB\n");
ASSERT(handle == (uv_handle_t*)&idle_2_handle);
ASSERT(idle_2_is_active);
idle_2_close_cb_called++;
idle_2_is_active = 0;
}
static void idle_2_cb(uv_idle_t* handle, int status) {
LOG("IDLE_2_CB\n");
ASSERT(handle == &idle_2_handle);
ASSERT(status == 0);
idle_2_cb_called++;
uv_close((uv_handle_t*)handle, idle_2_close_cb);
}
static void idle_1_cb(uv_idle_t* handle, int status) {
int r;
LOG("IDLE_1_CB\n");
ASSERT(handle != NULL);
ASSERT(status == 0);
ASSERT(idles_1_active > 0);
/* Init idle_2 and make it active */
if (!idle_2_is_active && !uv_is_closing((uv_handle_t*)&idle_2_handle)) {
r = uv_idle_init(uv_default_loop(), &idle_2_handle);
ASSERT(r == 0);
r = uv_idle_start(&idle_2_handle, idle_2_cb);
ASSERT(r == 0);
idle_2_is_active = 1;
idle_2_cb_started++;
}
idle_1_cb_called++;
if (idle_1_cb_called % 5 == 0) {
r = uv_idle_stop((uv_idle_t*)handle);
ASSERT(r == 0);
idles_1_active--;
}
}
static void idle_1_close_cb(uv_handle_t* handle) {
LOG("IDLE_1_CLOSE_CB\n");
ASSERT(handle != NULL);
idle_1_close_cb_called++;
}
static void prepare_1_close_cb(uv_handle_t* handle) {
LOG("PREPARE_1_CLOSE_CB");
ASSERT(handle == (uv_handle_t*)&prepare_1_handle);
prepare_1_close_cb_called++;
}
static void check_close_cb(uv_handle_t* handle) {
LOG("CHECK_CLOSE_CB\n");
ASSERT(handle == (uv_handle_t*)&check_handle);
check_close_cb_called++;
}
static void prepare_2_close_cb(uv_handle_t* handle) {
LOG("PREPARE_2_CLOSE_CB\n");
ASSERT(handle == (uv_handle_t*)&prepare_2_handle);
prepare_2_close_cb_called++;
}
static void check_cb(uv_check_t* handle, int status) {
int i, r;
LOG("CHECK_CB\n");
ASSERT(handle == &check_handle);
ASSERT(status == 0);
if (loop_iteration < ITERATIONS) {
/* Make some idle watchers active */
for (i = 0; i < 1 + (loop_iteration % IDLE_COUNT); i++) {
r = uv_idle_start(&idle_1_handles[i], idle_1_cb);
ASSERT(r == 0);
idles_1_active++;
}
} else {
/* End of the test - close all handles */
uv_close((uv_handle_t*)&prepare_1_handle, prepare_1_close_cb);
uv_close((uv_handle_t*)&check_handle, check_close_cb);
uv_close((uv_handle_t*)&prepare_2_handle, prepare_2_close_cb);
for (i = 0; i < IDLE_COUNT; i++) {
uv_close((uv_handle_t*)&idle_1_handles[i], idle_1_close_cb);
}
/* This handle is closed/recreated every time, close it only if it is */
/* active.*/
if (idle_2_is_active) {
uv_close((uv_handle_t*)&idle_2_handle, idle_2_close_cb);
}
}
check_cb_called++;
}
static void prepare_2_cb(uv_prepare_t* handle, int status) {
int r;
LOG("PREPARE_2_CB\n");
ASSERT(handle == &prepare_2_handle);
ASSERT(status == 0);
/* prepare_2 gets started by prepare_1 when (loop_iteration % 2 == 0), */
/* and it stops itself immediately. A started watcher is not queued */
/* until the next round, so when this callback is made */
/* (loop_iteration % 2 == 0) cannot be true. */
ASSERT(loop_iteration % 2 != 0);
r = uv_prepare_stop((uv_prepare_t*)handle);
ASSERT(r == 0);
prepare_2_cb_called++;
}
static void prepare_1_cb(uv_prepare_t* handle, int status) {
int r;
LOG("PREPARE_1_CB\n");
ASSERT(handle == &prepare_1_handle);
ASSERT(status == 0);
if (loop_iteration % 2 == 0) {
r = uv_prepare_start(&prepare_2_handle, prepare_2_cb);
ASSERT(r == 0);
}
prepare_1_cb_called++;
loop_iteration++;
printf("Loop iteration %d of %d.\n", loop_iteration, ITERATIONS);
}
TEST_IMPL(loop_handles) {
int i;
int r;
r = uv_prepare_init(uv_default_loop(), &prepare_1_handle);
ASSERT(r == 0);
r = uv_prepare_start(&prepare_1_handle, prepare_1_cb);
ASSERT(r == 0);
r = uv_check_init(uv_default_loop(), &check_handle);
ASSERT(r == 0);
r = uv_check_start(&check_handle, check_cb);
ASSERT(r == 0);
/* initialize only, prepare_2 is started by prepare_1_cb */
r = uv_prepare_init(uv_default_loop(), &prepare_2_handle);
ASSERT(r == 0);
for (i = 0; i < IDLE_COUNT; i++) {
/* initialize only, idle_1 handles are started by check_cb */
r = uv_idle_init(uv_default_loop(), &idle_1_handles[i]);
ASSERT(r == 0);
}
/* don't init or start idle_2, both is done by idle_1_cb */
/* the timer callback is there to keep the event loop polling */
/* unref it as it is not supposed to keep the loop alive */
r = uv_timer_init(uv_default_loop(), &timer_handle);
ASSERT(r == 0);
r = uv_timer_start(&timer_handle, timer_cb, TIMEOUT, TIMEOUT);
ASSERT(r == 0);
uv_unref((uv_handle_t*)&timer_handle);
r = uv_run(uv_default_loop());
ASSERT(r == 0);
ASSERT(loop_iteration == ITERATIONS);
ASSERT(prepare_1_cb_called == ITERATIONS);
ASSERT(prepare_1_close_cb_called == 1);
ASSERT(prepare_2_cb_called == floor(ITERATIONS / 2.0));
ASSERT(prepare_2_close_cb_called == 1);
ASSERT(check_cb_called == ITERATIONS);
ASSERT(check_close_cb_called == 1);
/* idle_1_cb should be called a lot */
ASSERT(idle_1_close_cb_called == IDLE_COUNT);
ASSERT(idle_2_close_cb_called == idle_2_cb_started);
ASSERT(idle_2_is_active == 0);
return 0;
}
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