GL_ARB_sync http://www.opengl.org/registry/specs/ARB/sync.txt GL_ARB_sync GL_SYNC_FLUSH_COMMANDS_BIT 0x00000001 GL_MAX_SERVER_WAIT_TIMEOUT 0x9111 GL_OBJECT_TYPE 0x9112 GL_SYNC_CONDITION 0x9113 GL_SYNC_STATUS 0x9114 GL_SYNC_FLAGS 0x9115 GL_SYNC_FENCE 0x9116 GL_SYNC_GPU_COMMANDS_COMPLETE 0x9117 GL_UNSIGNALED 0x9118 GL_SIGNALED 0x9119 GL_ALREADY_SIGNALED 0x911A GL_TIMEOUT_EXPIRED 0x911B GL_CONDITION_SATISFIED 0x911C GL_WAIT_FAILED 0x911D GL_TIMEOUT_IGNORED 0xFFFFFFFFFFFFFFFF GLenum glClientWaitSync (GLsync GLsync,GLbitfield flags,GLuint64 timeout) void glDeleteSync (GLsync GLsync) GLsync glFenceSync (GLenum condition,GLbitfield flags) void glGetInteger64v (GLenum pname, GLint64* params) void glGetSynciv (GLsync GLsync,GLenum pname,GLsizei bufSize,GLsizei* length, GLint *values) GLboolean glIsSync (GLsync GLsync) void glWaitSync (GLsync GLsync,GLbitfield flags,GLuint64 timeout)