On 10/22/2012 02:41 PM, Eric Anholt wrote:
I was going to go touch this code in Mesa, then I realised that we
didn't have a single test for it.

v2: Rebase on Chad's BUILD_* sedjob, and explicitly test various swap intervals.
v3: Rewrite wrapping loops.

Reviewed-by: Ian Romanick <[email protected]>

---
  tests/all.tests                                    |    8 ++
  tests/spec/CMakeLists.txt                          |    1 +
  tests/spec/glx_oml_sync_control/CMakeLists.gl.txt  |   30 ++++
  tests/spec/glx_oml_sync_control/CMakeLists.txt     |    1 +
  tests/spec/glx_oml_sync_control/common.c           |   88 ++++++++++++
  tests/spec/glx_oml_sync_control/common.h           |   16 +++
  .../swapbuffersmsc-divisor-zero.c                  |  143 ++++++++++++++++++++
  .../glx_oml_sync_control/swapbuffersmsc-return.c   |  116 ++++++++++++++++
  tests/spec/glx_oml_sync_control/waitformsc.c       |  102 ++++++++++++++
  9 files changed, 505 insertions(+)
  create mode 100644 tests/spec/glx_oml_sync_control/CMakeLists.gl.txt
  create mode 100644 tests/spec/glx_oml_sync_control/CMakeLists.txt
  create mode 100644 tests/spec/glx_oml_sync_control/common.c
  create mode 100644 tests/spec/glx_oml_sync_control/common.h
  create mode 100644 
tests/spec/glx_oml_sync_control/swapbuffersmsc-divisor-zero.c
  create mode 100644 tests/spec/glx_oml_sync_control/swapbuffersmsc-return.c
  create mode 100644 tests/spec/glx_oml_sync_control/waitformsc.c

diff --git a/tests/all.tests b/tests/all.tests
index 24e5855..37ebcbc 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -696,6 +696,14 @@ glx['GLX_EXT_create_context_es2_profile'] = 
create_context_es2_profile
  create_context_es2_profile['indirect rendering ES2 profile'] = 
concurrent_test('glx-create-context-indirect-es2-profile')
  create_context_es2_profile['invalid OpenGL ES version'] = 
concurrent_test('glx-create-context-invalid-es-version')

+oml_sync_control = Group();
+glx['GLX_OML_sync_control'] = oml_sync_control
+oml_sync_control['swapbuffersmsc-divisor-zero'] = 
concurrent_test('glx-oml-sync-control-swapbuffersmsc-divisor-zero')
+oml_sync_control['swapbuffersmsc-return'] = 
concurrent_test('glx-oml-sync-control-swapbuffersmsc-return')
+oml_sync_control['swapbuffersmsc-return swap_interval 0'] = 
concurrent_test('glx-oml-sync-control-swapbuffersmsc-return 0')
+oml_sync_control['swapbuffersmsc-return swap_interval 1'] = 
concurrent_test('glx-oml-sync-control-swapbuffersmsc-return 1')
+oml_sync_control['waitformsc'] = 
concurrent_test('glx-oml-sync-control-waitformsc')
+
  texturing = Group()
  add_concurrent_test(texturing, '1-1-linear-texture')
  add_plain_test(texturing, 'array-depth-roundtrip')
diff --git a/tests/spec/CMakeLists.txt b/tests/spec/CMakeLists.txt
index 1e2b0a1..351b113 100644
--- a/tests/spec/CMakeLists.txt
+++ b/tests/spec/CMakeLists.txt
@@ -52,6 +52,7 @@ add_subdirectory (gl-3.0)
  add_subdirectory (gl-3.1)
  add_subdirectory (glx_arb_create_context)
  add_subdirectory (glx_ext_import_context)
+add_subdirectory (glx_oml_sync_control)
  add_subdirectory (arb_vertex_type_2_10_10_10_rev)
  add_subdirectory (ext_texture_array)
  add_subdirectory (ext_texture_integer)
diff --git a/tests/spec/glx_oml_sync_control/CMakeLists.gl.txt 
b/tests/spec/glx_oml_sync_control/CMakeLists.gl.txt
new file mode 100644
index 0000000..d73365d
--- /dev/null
+++ b/tests/spec/glx_oml_sync_control/CMakeLists.gl.txt
@@ -0,0 +1,30 @@
+
+include_directories(
+       ${GLEXT_INCLUDE_DIR}
+       ${OPENGL_INCLUDE_PATH}
+)
+
+if(PIGLIT_BUILD_GLX_TESTS)
+    link_libraries (
+        piglitglxutil
+    )
+endif(PIGLIT_BUILD_GLX_TESTS)
+
+link_libraries (
+       ${OPENGL_gl_LIBRARY}
+       ${OPENGL_glu_LIBRARY}
+)
+
+IF(PIGLIT_BUILD_GLX_TESTS)
+       include_directories(
+               ${GLPROTO_INCLUDE_DIRS}
+       )
+       link_libraries (
+               ${X11_X11_LIB}
+       )
+       piglit_add_executable (glx-oml-sync-control-swapbuffersmsc-divisor-zero 
swapbuffersmsc-divisor-zero.c common.c)
+       piglit_add_executable (glx-oml-sync-control-swapbuffersmsc-return 
swapbuffersmsc-return.c common.c)
+       piglit_add_executable (glx-oml-sync-control-waitformsc waitformsc.c 
common.c)
+ENDIF(PIGLIT_BUILD_GLX_TESTS)
+
+# vim: ft=cmake:
diff --git a/tests/spec/glx_oml_sync_control/CMakeLists.txt 
b/tests/spec/glx_oml_sync_control/CMakeLists.txt
new file mode 100644
index 0000000..144a306
--- /dev/null
+++ b/tests/spec/glx_oml_sync_control/CMakeLists.txt
@@ -0,0 +1 @@
+piglit_include_target_api()
diff --git a/tests/spec/glx_oml_sync_control/common.c 
b/tests/spec/glx_oml_sync_control/common.c
new file mode 100644
index 0000000..db4c3aa
--- /dev/null
+++ b/tests/spec/glx_oml_sync_control/common.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <[email protected]>
+ *
+ */
+
+/** @file common.c
+ *
+ * Support code for running tests of GLX_OML_sync_control.
+ */
+
+#include "piglit-util-gl-common.h"
+#include "piglit-glx-util.h"
+#include "common.h"
+
+PFNGLXGETSYNCVALUESOMLPROC __piglit_glXGetSyncValuesOML;
+PFNGLXGETMSCRATEOMLPROC __piglit_glXGetMscRateOML;
+PFNGLXSWAPBUFFERSMSCOMLPROC __piglit_glXSwapBuffersMscOML;
+PFNGLXWAITFORMSCOMLPROC __piglit_glXWaitForMscOML;
+PFNGLXWAITFORSBCOMLPROC __piglit_glXWaitForSbcOML;
+Window win;
+XVisualInfo *visinfo;
+
+void
+piglit_oml_sync_control_test_run(enum piglit_result (*draw)(Display *dpy))
+{
+       Display *dpy;
+       GLXContext ctx;
+       const int proc_count = 5;
+       __GLXextFuncPtr *procs[proc_count];
+       const char *names[proc_count];
+       int i;
+
+#define ADD_FUNC(name)                                                 \
+       do {                                                            \
+               procs[i] = (__GLXextFuncPtr *)&(__piglit_##name);   \
+               names[i] = #name;                                       \
+               i++;                                                    \
+       } while (0)
+
+       i = 0;
+       ADD_FUNC(glXGetSyncValuesOML);
+       ADD_FUNC(glXGetMscRateOML);
+       ADD_FUNC(glXSwapBuffersMscOML);
+       ADD_FUNC(glXWaitForMscOML);
+       ADD_FUNC(glXWaitForSbcOML);
+
+       dpy = XOpenDisplay(NULL);
+       if (dpy == NULL) {
+               fprintf(stderr, "couldn't open display\n");
+               piglit_report_result(PIGLIT_FAIL);
+       }
+
+       piglit_require_glx_extension(dpy, "GLX_OML_sync_control");
+       piglit_glx_get_all_proc_addresses(procs, names, ARRAY_SIZE(procs));
+
+       visinfo = piglit_get_glx_visual(dpy);
+       win = piglit_get_glx_window(dpy, visinfo);
+       ctx = piglit_get_glx_context(dpy, visinfo);
+       glXMakeCurrent(dpy, win, ctx);
+
+       piglit_dispatch_default_init();
+
+       XMapWindow(dpy, win);
+
+       piglit_glx_event_loop(dpy, draw);
+}
diff --git a/tests/spec/glx_oml_sync_control/common.h 
b/tests/spec/glx_oml_sync_control/common.h
new file mode 100644
index 0000000..c06bdd7
--- /dev/null
+++ b/tests/spec/glx_oml_sync_control/common.h
@@ -0,0 +1,16 @@
+#define glXGetSyncValuesOML __piglit_glXGetSyncValuesOML
+#define glXGetMscRateOML __piglit_glXGetMscRateOML
+#define glXSwapBuffersMscOML __piglit_glXSwapBuffersMscOML
+#define glXWaitForMscOML __piglit_glXWaitForMscOML
+#define glXWaitForSbcOML __piglit_glXWaitForSbcOML
+
+extern PFNGLXGETSYNCVALUESOMLPROC __piglit_glXGetSyncValuesOML;
+extern PFNGLXGETMSCRATEOMLPROC __piglit_glXGetMscRateOML;
+extern PFNGLXSWAPBUFFERSMSCOMLPROC __piglit_glXSwapBuffersMscOML;
+extern PFNGLXWAITFORMSCOMLPROC __piglit_glXWaitForMscOML;
+extern PFNGLXWAITFORSBCOMLPROC __piglit_glXWaitForSbcOML;
+
+extern Window win;
+extern XVisualInfo *visinfo;
+
+void piglit_oml_sync_control_test_run(enum piglit_result (*draw)(Display 
*dpy));
diff --git a/tests/spec/glx_oml_sync_control/swapbuffersmsc-divisor-zero.c 
b/tests/spec/glx_oml_sync_control/swapbuffersmsc-divisor-zero.c
new file mode 100644
index 0000000..555f551
--- /dev/null
+++ b/tests/spec/glx_oml_sync_control/swapbuffersmsc-divisor-zero.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <[email protected]>
+ *
+ */
+
+/** @file swapbuffersmsc-divisor-zero.c
+ *
+ * Test that when the divsior is zero in glXSwapBuffersMscOML, the
+ * target MSC is reached.
+ */
+
+#include "piglit-util-gl-common.h"
+#include "piglit-glx-util.h"
+#include "common.h"
+
+int piglit_width = 50, piglit_height = 50;
+
+enum piglit_result
+draw(Display *dpy)
+{
+       /* Fill the variables that will be returned as out values with
+        * junk to better detect failure there.
+        */
+       int64_t start_ust = 0xd0, start_msc = 0xd0, start_sbc = 0xd0;
+       int64_t swapped_ust = 0xd0, swapped_msc = 0xd0, swapped_sbc = 0xd0;
+       int64_t current_ust = 0xd0, current_msc = 0xd0, current_sbc = 0xd0;
+       int64_t target_msc, outstanding_sbc;
+       bool already_wrapped = false;
+
+       glXGetSyncValuesOML(dpy, win, &start_ust, &start_msc, &start_sbc);
+       if (start_sbc != 0) {
+               fprintf(stderr,
+                       "Initial SBC for the window should be 0, was %lld\n",
+                       (long long)start_sbc);
+               piglit_report_result(PIGLIT_FAIL);
+       }
+       outstanding_sbc = start_sbc;
+
+wrap:
+       glClearColor(0.0, 1.0, 0.0, 0.0);
+       glClear(GL_COLOR_BUFFER_BIT);
+
+       /* Queue a swap for 5 frames from when we started. */
+       target_msc = start_msc + 5;
+       glXSwapBuffersMscOML(dpy, win, target_msc, 0, 0);
+       outstanding_sbc++;
+
+       /* Wait for that swap. */
+       glXWaitForSbcOML(dpy, win, outstanding_sbc,
+                        &swapped_ust, &swapped_msc, &swapped_sbc);
+       if (swapped_sbc != outstanding_sbc) {
+               fprintf(stderr,
+                       "glXWaitForSbcOML() returned SBC %lld, "
+                       "should be %lld\n",
+                       (long long)swapped_sbc, (long long)outstanding_sbc);
+               piglit_report_result(PIGLIT_FAIL);
+       }
+
+       glXGetSyncValuesOML(dpy, win,
+                           &current_ust, &current_msc, &current_sbc);
+       if (current_sbc != outstanding_sbc) {
+               fprintf(stderr,
+                       "glXGetSyncValuesOML() returned SBC %lld, "
+                       "should be %lld\n",
+                       (long long)current_sbc, (long long)outstanding_sbc);
+               piglit_report_result(PIGLIT_FAIL);
+       }
+
+       if (current_msc < start_msc) {
+               /* The MSC counter wrapped. Try the test again.  But
+                * it definitely won't wrap this time.
+                */
+               if (already_wrapped) {
+                       fprintf(stderr,
+                               "Wrapped MSC twice!\n"
+                               "Second time: %lld -> %lld\n",
+                               (long long)start_msc,
+                               (long long)current_msc);
+                       piglit_report_result(PIGLIT_FAIL);
+               }
+
+               glXGetSyncValuesOML(dpy, win,
+                                   &start_ust, &start_msc, &start_sbc);
+               already_wrapped = true;
+               goto wrap;
+       }
+
+       if (swapped_msc < target_msc) {
+               fprintf(stderr,
+                       "glXWaitForSbcOML() returned MSC %lld, "
+                       "should be at least %lld\n",
+                       (long long)swapped_msc,
+                       (long long)target_msc);
+               piglit_report_result(PIGLIT_FAIL);
+       }
+
+       if (current_msc < target_msc ||
+           current_msc < swapped_msc) {
+               fprintf(stderr,
+                       "glXGetSyncValuesMsc() returned MSC %lld, "
+                       "should be at least swap target msc (%lld) "
+                       "and last swap MSC (%lld)\n",
+                       (long long)current_msc,
+                       (long long)target_msc,
+                       (long long)swapped_msc);
+               piglit_report_result(PIGLIT_FAIL);
+       }
+
+       piglit_report_result(PIGLIT_PASS);
+
+       /* UNREACHED */
+       return PIGLIT_FAIL;
+}
+
+int
+main(int argc, char **argv)
+{
+       piglit_oml_sync_control_test_run(draw);
+
+       return 0;
+}
diff --git a/tests/spec/glx_oml_sync_control/swapbuffersmsc-return.c 
b/tests/spec/glx_oml_sync_control/swapbuffersmsc-return.c
new file mode 100644
index 0000000..92f34ea
--- /dev/null
+++ b/tests/spec/glx_oml_sync_control/swapbuffersmsc-return.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <[email protected]>
+ *
+ */
+
+/** @file swapbuffersmsc-return.c
+ *
+ * Test that glXSwapBuffersMscOML() returns a correct sbc value.
+ *
+ * Catches a bug in the X Server when a swap interval of 0 is used.
+ */
+
+#include "piglit-util-gl-common.h"
+#include "piglit-glx-util.h"
+#include "common.h"
+
+int piglit_width = 50, piglit_height = 50;
+
+int swap_interval = -1;
+
+enum piglit_result
+draw(Display *dpy)
+{
+       /* Fill the variables that will be returned as out values with
+        * junk to better detect failure there.
+        */
+       int64_t start_ust = 0xd0, start_msc = 0xd0, start_sbc = 0xd0;
+       int64_t next_sbc;
+       bool pass = true;
+       int i;
+
+#if defined(GLX_MESA_swap_control)
+       if (swap_interval != -1) {
+               PFNGLXSWAPINTERVALMESAPROC pglXSwapIntervalMESA;
+
+               printf("Testing with swap interval %d\n", swap_interval);
+
+               piglit_require_glx_extension(dpy, "GLX_MESA_swap_control");
+               pglXSwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC)
+                       glXGetProcAddressARB((const GLubyte *)
+                                            "glXSwapIntervalMESA");
+               pglXSwapIntervalMESA(swap_interval);
+       } else {
+               printf("Testing with default swap interval\n");
+       }
+#else
+       printf("Testing with default swap interval\n");
+#endif
+
+       glXGetSyncValuesOML(dpy, win, &start_ust, &start_msc, &start_sbc);
+       if (start_sbc != 0) {
+               fprintf(stderr,
+                       "Initial SBC for the window should be 0, was %lld\n",
+                       (long long)start_sbc);
+               piglit_report_result(PIGLIT_FAIL);
+       }
+       next_sbc = start_sbc + 1;
+
+       for (i = 0; i < 3; i++) {
+               int64_t ret_sbc;
+
+               glClearColor(0.0, 1.0, 0.0, 0.0);
+               glClear(GL_COLOR_BUFFER_BIT);
+
+               ret_sbc = glXSwapBuffersMscOML(dpy, win, 0, 1, 0);
+
+               if (ret_sbc != next_sbc) {
+                       printf("Frame %d: sbc was %lld, should be %lld\n",
+                              i,
+                              (long long)ret_sbc,
+                              (long long)next_sbc);
+                       pass = false;
+               }
+
+               next_sbc++;
+       }
+
+       piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+
+       /* UNREACHED */
+       return PIGLIT_FAIL;
+}
+
+int
+main(int argc, char **argv)
+{
+       if (argc >= 2) {
+               swap_interval = atoi(argv[1]);
+       }
+
+       piglit_oml_sync_control_test_run(draw);
+
+       return 0;
+}
diff --git a/tests/spec/glx_oml_sync_control/waitformsc.c 
b/tests/spec/glx_oml_sync_control/waitformsc.c
new file mode 100644
index 0000000..6fdef6e
--- /dev/null
+++ b/tests/spec/glx_oml_sync_control/waitformsc.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <[email protected]>
+ *
+ */
+
+/** @file waitformsc.c
+ *
+ * Test that glXWaitForMscOML() waits until both it and
+ * glXGetSyncValuesOML() return a an msc that meet the target.
+ */
+
+#include "piglit-util-gl-common.h"
+#include "piglit-glx-util.h"
+#include "common.h"
+
+int piglit_width = 50, piglit_height = 50;
+
+enum piglit_result
+draw(Display *dpy)
+{
+       /* Fill the variables that will be returned as out values with
+        * junk to better detect failure there.
+        */
+       int64_t start_ust = 0xd0, start_msc = 0xd0, start_sbc = 0xd0;
+       int64_t wait_ust = 0xd0, wait_msc = 0xd0, wait_sbc = 0xd0;
+       int64_t current_ust = 0xd0, current_msc = 0xd0, current_sbc = 0xd0;
+       int64_t target_msc;
+       bool already_wrapped = false;
+
+wrap:
+       glXGetSyncValuesOML(dpy, win, &start_ust, &start_msc, &start_sbc);
+
+       /* Wait for the MSC to be at least equal to target,
+        * with no divisor trickery.
+        */
+       target_msc = start_msc + 5;
+       glXWaitForMscOML(dpy, win, target_msc, 0, 0,
+                        &wait_ust, &wait_msc, &wait_sbc);
+
+       glXGetSyncValuesOML(dpy, win,
+                           &current_ust, &current_msc, &current_sbc);
+
+       if (current_msc < target_msc) {
+               /* The clock may have actually wrapped, in which case
+                * we need to try again because we're not doing
+                * wrapping math here for simplicity.
+                */
+               if (!already_wrapped) {
+                       already_wrapped = true;
+                       goto wrap;
+               }
+
+               fprintf(stderr,
+                       "glXGetSyncValuesOML() returned msc of %lld, "
+                       "expected >= %lld\n",
+                       (long long)current_msc,
+                       (long long)target_msc);
+       }
+
+       if (wait_msc < target_msc) {
+               fprintf(stderr,
+                       "glXWaitForMscOML() returned msc of %lld, "
+                       "expected >= %lld\n",
+                       (long long)wait_msc,
+                       (long long)target_msc);
+       }
+
+       piglit_report_result(PIGLIT_PASS);
+
+       /* UNREACHED */
+       return PIGLIT_FAIL;
+}
+
+int
+main(int argc, char **argv)
+{
+       piglit_oml_sync_control_test_run(draw);
+
+       return 0;
+}


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