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https://github.com/neovim/neovim.git
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c20b802511
- Implement `loop_schedule` method for queueing events from other threads - Make `loop_poll_events` `recursive` static variable a field of the Loop structure
110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
#include <stdarg.h>
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#include <stdint.h>
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#include <uv.h>
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#include "nvim/event/loop.h"
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#include "nvim/event/process.h"
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#ifdef INCLUDE_GENERATED_DECLARATIONS
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# include "event/loop.c.generated.h"
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#endif
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void loop_init(Loop *loop, void *data)
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{
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uv_loop_init(&loop->uv);
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loop->recursive = 0;
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loop->uv.data = loop;
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loop->children = kl_init(WatcherPtr);
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loop->children_stop_requests = 0;
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loop->events = queue_new_parent(loop_on_put, loop);
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loop->fast_events = queue_new_child(loop->events);
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loop->thread_events = queue_new_parent(NULL, NULL);
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uv_mutex_init(&loop->mutex);
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uv_async_init(&loop->uv, &loop->async, async_cb);
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uv_signal_init(&loop->uv, &loop->children_watcher);
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uv_timer_init(&loop->uv, &loop->children_kill_timer);
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uv_timer_init(&loop->uv, &loop->poll_timer);
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}
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void loop_poll_events(Loop *loop, int ms)
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{
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if (loop->recursive++) {
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abort(); // Should not re-enter uv_run
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}
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uv_run_mode mode = UV_RUN_ONCE;
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if (ms > 0) {
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// Use a repeating timeout of ms milliseconds to make sure
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// we do not block indefinitely for I/O.
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uv_timer_start(&loop->poll_timer, timer_cb, (uint64_t)ms, (uint64_t)ms);
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} else if (ms == 0) {
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// For ms == 0, we need to do a non-blocking event poll by
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// setting the run mode to UV_RUN_NOWAIT.
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mode = UV_RUN_NOWAIT;
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}
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uv_run(&loop->uv, mode);
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if (ms > 0) {
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uv_timer_stop(&loop->poll_timer);
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}
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loop->recursive--; // Can re-enter uv_run now
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queue_process_events(loop->fast_events);
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}
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// Schedule an event from another thread
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void loop_schedule(Loop *loop, Event event)
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{
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uv_mutex_lock(&loop->mutex);
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queue_put_event(loop->thread_events, event);
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uv_async_send(&loop->async);
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uv_mutex_unlock(&loop->mutex);
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}
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void loop_on_put(Queue *queue, void *data)
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{
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Loop *loop = data;
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// Sometimes libuv will run pending callbacks(timer for example) before
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// blocking for a poll. If this happens and the callback pushes a event to one
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// of the queues, the event would only be processed after the poll
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// returns(user hits a key for example). To avoid this scenario, we call
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// uv_stop when a event is enqueued.
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uv_stop(&loop->uv);
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}
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void loop_close(Loop *loop)
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{
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uv_mutex_destroy(&loop->mutex);
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uv_close((uv_handle_t *)&loop->children_watcher, NULL);
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uv_close((uv_handle_t *)&loop->children_kill_timer, NULL);
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uv_close((uv_handle_t *)&loop->poll_timer, NULL);
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uv_close((uv_handle_t *)&loop->async, NULL);
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do {
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uv_run(&loop->uv, UV_RUN_DEFAULT);
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} while (uv_loop_close(&loop->uv));
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queue_free(loop->events);
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queue_free(loop->fast_events);
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queue_free(loop->thread_events);
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kl_destroy(WatcherPtr, loop->children);
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}
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static void async_cb(uv_async_t *handle)
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{
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Loop *l = handle->loop->data;
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uv_mutex_lock(&l->mutex);
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while (!queue_empty(l->thread_events)) {
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Event ev = queue_get(l->thread_events);
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queue_put_event(l->fast_events, ev);
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}
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uv_mutex_unlock(&l->mutex);
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}
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static void timer_cb(uv_timer_t *handle)
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{
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}
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