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Diffstat (limited to 'Utilities/cmlibuv/src/timer.c')
| -rw-r--r-- | Utilities/cmlibuv/src/timer.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/Utilities/cmlibuv/src/timer.c b/Utilities/cmlibuv/src/timer.c new file mode 100644 index 0000000..dd78bcb --- /dev/null +++ b/Utilities/cmlibuv/src/timer.c @@ -0,0 +1,181 @@ +/* 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 "uv.h" +#include "uv-common.h" +#include "heap-inl.h" + +#include <assert.h> +#include <limits.h> + + +static struct heap *timer_heap(const uv_loop_t* loop) { +#ifdef _WIN32 + return (struct heap*) loop->timer_heap; +#else + return (struct heap*) &loop->timer_heap; +#endif +} + + +static int timer_less_than(const struct heap_node* ha, + const struct heap_node* hb) { + const uv_timer_t* a; + const uv_timer_t* b; + + a = container_of(ha, uv_timer_t, heap_node); + b = container_of(hb, uv_timer_t, heap_node); + + if (a->timeout < b->timeout) + return 1; + if (b->timeout < a->timeout) + return 0; + + /* Compare start_id when both have the same timeout. start_id is + * allocated with loop->timer_counter in uv_timer_start(). + */ + if (a->start_id < b->start_id) + return 1; + if (b->start_id < a->start_id) + return 0; + + return 0; +} + + +int uv_timer_init(uv_loop_t* loop, uv_timer_t* handle) { + uv__handle_init(loop, (uv_handle_t*)handle, UV_TIMER); + handle->timer_cb = NULL; + handle->repeat = 0; + return 0; +} + + +int uv_timer_start(uv_timer_t* handle, + uv_timer_cb cb, + uint64_t timeout, + uint64_t repeat) { + uint64_t clamped_timeout; + + if (cb == NULL) + return UV_EINVAL; + + if (uv__is_active(handle)) + uv_timer_stop(handle); + + clamped_timeout = handle->loop->time + timeout; + if (clamped_timeout < timeout) + clamped_timeout = (uint64_t) -1; + + handle->timer_cb = cb; + handle->timeout = clamped_timeout; + handle->repeat = repeat; + /* start_id is the second index to be compared in uv__timer_cmp() */ + handle->start_id = handle->loop->timer_counter++; + + heap_insert(timer_heap(handle->loop), + (struct heap_node*) &handle->heap_node, + timer_less_than); + uv__handle_start(handle); + + return 0; +} + + +int uv_timer_stop(uv_timer_t* handle) { + if (!uv__is_active(handle)) + return 0; + + heap_remove(timer_heap(handle->loop), + (struct heap_node*) &handle->heap_node, + timer_less_than); + uv__handle_stop(handle); + + return 0; +} + + +int uv_timer_again(uv_timer_t* handle) { + if (handle->timer_cb == NULL) + return UV_EINVAL; + + if (handle->repeat) { + uv_timer_stop(handle); + uv_timer_start(handle, handle->timer_cb, handle->repeat, handle->repeat); + } + + return 0; +} + + +void uv_timer_set_repeat(uv_timer_t* handle, uint64_t repeat) { + handle->repeat = repeat; +} + + +uint64_t uv_timer_get_repeat(const uv_timer_t* handle) { + return handle->repeat; +} + + +int uv__next_timeout(const uv_loop_t* loop) { + const struct heap_node* heap_node; + const uv_timer_t* handle; + uint64_t diff; + + heap_node = heap_min(timer_heap(loop)); + if (heap_node == NULL) + return -1; /* block indefinitely */ + + handle = container_of(heap_node, uv_timer_t, heap_node); + if (handle->timeout <= loop->time) + return 0; + + diff = handle->timeout - loop->time; + if (diff > INT_MAX) + diff = INT_MAX; + + return (int) diff; +} + + +void uv__run_timers(uv_loop_t* loop) { + struct heap_node* heap_node; + uv_timer_t* handle; + + for (;;) { + heap_node = heap_min(timer_heap(loop)); + if (heap_node == NULL) + break; + + handle = container_of(heap_node, uv_timer_t, heap_node); + if (handle->timeout > loop->time) + break; + + uv_timer_stop(handle); + uv_timer_again(handle); + handle->timer_cb(handle); + } +} + + +void uv__timer_close(uv_timer_t* handle) { + uv_timer_stop(handle); +} |