1GL_APPLE_sync 2https://www.khronos.org/registry/OpenGL/extensions/APPLE/APPLE_sync.txt 3GL_APPLE_sync 4 5 GL_TIMEOUT_IGNORED_APPLE 0xFFFFFFFFFFFFFFFFull 6 GL_SYNC_FLUSH_COMMANDS_BIT_APPLE 0x00000001 7 GL_SYNC_OBJECT_APPLE 0x8A53 8 GL_MAX_SERVER_WAIT_TIMEOUT_APPLE 0x9111 9 GL_OBJECT_TYPE_APPLE 0x9112 10 GL_SYNC_CONDITION_APPLE 0x9113 11 GL_SYNC_STATUS_APPLE 0x9114 12 GL_SYNC_FLAGS_APPLE 0x9115 13 GL_SYNC_FENCE_APPLE 0x9116 14 GL_SYNC_GPU_COMMANDS_COMPLETE_APPLE 0x9117 15 GL_UNSIGNALED_APPLE 0x9118 16 GL_SIGNALED_APPLE 0x9119 17 GL_ALREADY_SIGNALED_APPLE 0x911A 18 GL_TIMEOUT_EXPIRED_APPLE 0x911B 19 GL_CONDITION_SATISFIED_APPLE 0x911C 20 GL_WAIT_FAILED_APPLE 0x911D 21 GLenum glClientWaitSyncAPPLE (GLsync GLsync, GLbitfield flags, GLuint64 timeout) 22 void glDeleteSyncAPPLE (GLsync GLsync) 23 GLsync glFenceSyncAPPLE (GLenum condition, GLbitfield flags) 24 void glGetInteger64vAPPLE (GLenum pname, GLint64* params) 25 void glGetSyncivAPPLE (GLsync GLsync, GLenum pname, GLsizei bufSize, GLsizei* length, GLint *values) 26 GLboolean glIsSyncAPPLE (GLsync GLsync) 27 void glWaitSyncAPPLE (GLsync GLsync, GLbitfield flags, GLuint64 timeout) 28