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glClientWaitSync appears to be a busy wait, at least on my machine. But why wait indefinitely anyway?

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This commit is contained in:
Thomas Harte 2016-06-29 21:32:47 -04:00
parent 5c85366de2
commit 4ac619f569
1 changed files with 7 additions and 1 deletions
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8
Outputs/CRT/Internals/CRTOpenGL.cpp
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@ -192,7 +192,13 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
if(_fence != nullptr)
{
glClientWaitSync(_fence, GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
// if the GPU is still busy, don't wait; we'll catch it next time
if(glClientWaitSync(_fence, GL_SYNC_FLUSH_COMMANDS_BIT, 0) == GL_TIMEOUT_EXPIRED)
{
_draw_mutex->unlock();
return;
}
glDeleteSync(_fence);
}