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21 lines
566 B
C++
21 lines
566 B
C++
#include "stdafx.h"
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#include "fence.h"
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gl::fence::fence()
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{
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sync = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
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}
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gl::fence::~fence()
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{
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glDeleteSync(sync);
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}
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bool gl::fence::is_signalled()
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{
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// glClientWaitSync is faster than glGetSynciv. glGetSynciv probably tries to synchronize cpu and gpu
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// https://stackoverflow.com/questions/34601376/which-to-use-for-opengl-client-side-waiting-glgetsynciv-vs-glclientwaitsync
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GLenum r = glClientWaitSync(sync, GL_SYNC_FLUSH_COMMANDS_BIT, 1);
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return r == GL_ALREADY_SIGNALED || r == GL_CONDITION_SATISFIED;
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}
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