Add a new libglaze library

[glaze] / glaze.c

diff --git a/glaze.c b/glaze.c
new file mode 100644 (file)
index 0000000..7207025
--- /dev/null
+++ b/glaze.c
@@ -0,0 +1,63 @@
+/* Copyright © 2013, 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 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.
+ */
+
+#define _GNU_SOURCE
+#include <dlfcn.h>
+
+#include "glaze.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+void *
+glaze_lookup (char *function)
+{
+       static void *libgl_handle = NULL;
+       void *ret;
+
+       if (libgl_handle == NULL) {
+               const char *path;
+
+               path = getenv ("GLAZE_LIBGL");
+               if (path == NULL) {
+                       fprintf (stderr, "GLAZE_LIBGL unset. "
+                                "Please set to path of libGL.so under glaze.\n"
+                               );
+                       exit (1);
+               }
+
+               libgl_handle = dlopen (path, RTLD_LAZY | RTLD_GLOBAL);
+               if (libgl_handle == NULL) {
+                       fprintf (stderr, "Error: Failed to dlopen %s\n", path);
+                       exit (1);
+               }
+       }
+
+       ret = dlsym (libgl_handle, function);
+
+       if (ret == NULL) {
+               fprintf (stderr, "Error: glaze_lookup failed to dlsym %s\n",
+                        function);
+               exit (1);
+       }
+
+       return ret;
+}