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200 lines
8.4 KiB
200 lines
8.4 KiB
/* Copyright The libuv project and contributors. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "uv.h"
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#include "task.h"
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#include <string.h>
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/*
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* The idea behind the test is as follows.
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* Certain handle types are stored in a queue internally.
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* Extra care should be taken for removal of a handle from the queue while iterating over the queue.
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* (i.e., QUEUE_REMOVE() called within QUEUE_FOREACH())
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* This usually happens when someone closes or stops a handle from within its callback.
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* So we need to check that we haven't screwed the queue on close/stop.
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* To do so we do the following (for each handle type):
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* 1. Create and start 3 handles (#0, #1, and #2).
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*
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* The queue after the start() calls:
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* ..=> [queue head] <=> [handle] <=> [handle #1] <=> [handle] <=..
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*
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* 2. Trigger handles to fire (for uv_idle_t, uv_prepare_t, and uv_check_t there is nothing to do).
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*
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* 3. In the callback for the first-executed handle (#0 or #2 depending on handle type)
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* stop the handle and the next one (#1).
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* (for uv_idle_t, uv_prepare_t, and uv_check_t callbacks are executed in the reverse order as they are start()'ed,
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* so callback for handle #2 will be called first)
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*
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* The queue after the stop() calls:
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* correct foreach "next" |
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* \/
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* ..=> [queue head] <==============================> [handle] <=..
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* [ ] <- [handle] <=> [handle #1] -> [ ]
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* /\
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* wrong foreach "next" |
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*
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* 4. The callback for handle #1 shouldn't be called because the handle #1 is stopped in the previous step.
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* However, if QUEUE_REMOVE() is not handled properly within QUEUE_FOREACH(), the callback _will_ be called.
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*/
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static const unsigned first_handle_number_idle = 2;
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static const unsigned first_handle_number_prepare = 2;
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static const unsigned first_handle_number_check = 2;
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#ifdef __linux__
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static const unsigned first_handle_number_fs_event = 0;
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#endif
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#define DEFINE_GLOBALS_AND_CBS(name) \
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static uv_##name##_t (name)[3]; \
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static unsigned name##_cb_calls[3]; \
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\
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static void name##2_cb(uv_##name##_t* handle) { \
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ASSERT(handle == &(name)[2]); \
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if (first_handle_number_##name == 2) { \
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uv_close((uv_handle_t*)&(name)[2], NULL); \
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uv_close((uv_handle_t*)&(name)[1], NULL); \
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} \
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name##_cb_calls[2]++; \
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} \
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\
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static void name##1_cb(uv_##name##_t* handle) { \
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ASSERT(handle == &(name)[1]); \
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ASSERT(0 && "Shouldn't be called" && (&name[0])); \
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} \
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\
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static void name##0_cb(uv_##name##_t* handle) { \
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ASSERT(handle == &(name)[0]); \
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if (first_handle_number_##name == 0) { \
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uv_close((uv_handle_t*)&(name)[0], NULL); \
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uv_close((uv_handle_t*)&(name)[1], NULL); \
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} \
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name##_cb_calls[0]++; \
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} \
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\
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static const uv_##name##_cb name##_cbs[] = { \
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(uv_##name##_cb)name##0_cb, \
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(uv_##name##_cb)name##1_cb, \
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(uv_##name##_cb)name##2_cb, \
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};
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#define INIT_AND_START(name, loop) \
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do { \
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size_t i; \
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for (i = 0; i < ARRAY_SIZE(name); i++) { \
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int r; \
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r = uv_##name##_init((loop), &(name)[i]); \
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ASSERT(r == 0); \
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\
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r = uv_##name##_start(&(name)[i], name##_cbs[i]); \
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ASSERT(r == 0); \
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} \
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} while (0)
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#define END_ASSERTS(name) \
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do { \
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ASSERT(name##_cb_calls[0] == 1); \
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ASSERT(name##_cb_calls[1] == 0); \
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ASSERT(name##_cb_calls[2] == 1); \
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} while (0)
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DEFINE_GLOBALS_AND_CBS(idle)
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DEFINE_GLOBALS_AND_CBS(prepare)
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DEFINE_GLOBALS_AND_CBS(check)
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#ifdef __linux__
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DEFINE_GLOBALS_AND_CBS(fs_event)
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static const char watched_dir[] = ".";
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static uv_timer_t timer;
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static unsigned helper_timer_cb_calls;
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static void init_and_start_fs_events(uv_loop_t* loop) {
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size_t i;
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for (i = 0; i < ARRAY_SIZE(fs_event); i++) {
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int r;
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r = uv_fs_event_init(loop, &fs_event[i]);
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ASSERT(r == 0);
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r = uv_fs_event_start(&fs_event[i],
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(uv_fs_event_cb)fs_event_cbs[i],
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watched_dir,
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0);
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ASSERT(r == 0);
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}
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}
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static void helper_timer_cb(uv_timer_t* thandle) {
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int r;
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uv_fs_t fs_req;
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/* fire all fs_events */
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r = uv_fs_utime(thandle->loop, &fs_req, watched_dir, 0, 0, NULL);
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ASSERT(r == 0);
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ASSERT(fs_req.result == 0);
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ASSERT(fs_req.fs_type == UV_FS_UTIME);
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ASSERT(strcmp(fs_req.path, watched_dir) == 0);
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uv_fs_req_cleanup(&fs_req);
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helper_timer_cb_calls++;
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}
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#endif
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TEST_IMPL(queue_foreach_delete) {
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uv_loop_t* loop;
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int r;
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loop = uv_default_loop();
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INIT_AND_START(idle, loop);
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INIT_AND_START(prepare, loop);
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INIT_AND_START(check, loop);
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#ifdef __linux__
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init_and_start_fs_events(loop);
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/* helper timer to trigger async and fs_event callbacks */
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r = uv_timer_init(loop, &timer);
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ASSERT(r == 0);
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r = uv_timer_start(&timer, helper_timer_cb, 0, 0);
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ASSERT(r == 0);
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#endif
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r = uv_run(loop, UV_RUN_NOWAIT);
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ASSERT(r == 1);
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END_ASSERTS(idle);
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END_ASSERTS(prepare);
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END_ASSERTS(check);
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#ifdef __linux__
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ASSERT(helper_timer_cb_calls == 1);
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#endif
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MAKE_VALGRIND_HAPPY();
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return 0;
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}
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