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Kludge to prevent busy-waiting while no frames are generating

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This commit is contained in:
Jeffrey Pfau 2013-04-23 23:07:24 -07:00
parent 754725e124
commit b3d9a1918b
1 changed files with 11 additions and 7 deletions
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18
src/main.c
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@ -106,19 +106,23 @@ static void _GBASDLRunloop(struct GBAThread* context, struct GLSoftwareRenderer*
glLoadIdentity(); glLoadIdentity();
glOrtho(0, 240, 160, 0, 0, 1); glOrtho(0, 240, 160, 0, 0, 1);
while (context->started) { while (context->started) {
glBindTexture(GL_TEXTURE_2D, renderer->tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB5, 256, 256, 0, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV, renderer->d.outputBuffer);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
pthread_mutex_lock(&renderer->d.mutex); pthread_mutex_lock(&renderer->d.mutex);
if (renderer->d.d.framesPending) { if (renderer->d.d.framesPending) {
--renderer->d.d.framesPending; renderer->d.d.framesPending = 0;
pthread_mutex_unlock(&renderer->d.mutex); pthread_mutex_unlock(&renderer->d.mutex);
glBindTexture(GL_TEXTURE_2D, renderer->tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB5, 256, 256, 0, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV, renderer->d.outputBuffer);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
SDL_GL_SwapBuffers(); SDL_GL_SwapBuffers();
pthread_mutex_lock(&renderer->d.mutex); pthread_mutex_lock(&renderer->d.mutex);
pthread_cond_broadcast(&renderer->d.cond);
pthread_mutex_unlock(&renderer->d.mutex);
} else {
pthread_mutex_unlock(&renderer->d.mutex);
// We have no frame, let's just wait a sec to see if we get one.
usleep(500);
} }
pthread_cond_broadcast(&renderer->d.cond);
pthread_mutex_unlock(&renderer->d.mutex);
while (SDL_PollEvent(&event)) { while (SDL_PollEvent(&event)) {
switch (event.type) { switch (event.type) {
case SDL_QUIT: case SDL_QUIT: