8620d06741
This allows to schedule a runnable to be executed on the main thread, until the event loop is explicitly terminated. It is guaranteed that all accepted runnables will be executed (this avoids possible memory leaks if a runnable owns resources). PR #5270 <https://github.com/Genymobile/scrcpy/pull/5270>
67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
#include "events.h"
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#include "util/log.h"
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#include "util/thread.h"
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bool
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sc_push_event_impl(uint32_t type, const char *name) {
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SDL_Event event;
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event.type = type;
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int ret = SDL_PushEvent(&event);
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// ret < 0: error (queue full)
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// ret == 0: event was filtered
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// ret == 1: success
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if (ret != 1) {
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LOGE("Could not post %s event: %s", name, SDL_GetError());
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return false;
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}
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return true;
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}
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bool
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sc_post_to_main_thread(sc_runnable_fn run, void *userdata) {
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SDL_Event event = {
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.user = {
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.type = SC_EVENT_RUN_ON_MAIN_THREAD,
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.data1 = run,
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.data2 = userdata,
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},
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};
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int ret = SDL_PushEvent(&event);
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// ret < 0: error (queue full)
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// ret == 0: event was filtered
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// ret == 1: success
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if (ret != 1) {
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if (ret == 0) {
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// if ret == 0, this is expected on exit, log in debug mode
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LOGD("Could not post runnable to main thread (filtered)");
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} else {
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assert(ret < 0);
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LOGW("Could not post runnable to main thread: %s", SDL_GetError());
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}
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return false;
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}
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return true;
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}
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static int SDLCALL
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task_event_filter(void *userdata, SDL_Event *event) {
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(void) userdata;
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if (event->type == SC_EVENT_RUN_ON_MAIN_THREAD) {
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// Reject this event type from now on
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return 0;
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}
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return 1;
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}
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void
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sc_reject_new_runnables(void) {
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assert(sc_thread_get_id() == SC_MAIN_THREAD_ID);
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SDL_SetEventFilter(task_event_filter, NULL);
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}
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