#define _GNU_SOURCE
#include <dlfcn.h>
+#include "glaze.h"
+
#include <stdio.h>
#include <stdlib.h>
-void *libgl_handle;
-void *wrapper_handle;
-
-static void
-open_libgl_handle (void)
+void *
+glaze_lookup (char *function)
{
- const char *path;
-
- if (libgl_handle)
- return;
-
- path = getenv ("GLAZE_LIBGL");
- if (path == NULL) {
- fprintf (stderr, "GLAZE_LIBGL unset. Please set to path of real libGL.so under glaze.\n");
- exit (1);
- }
+ static void *libgl_handle = NULL;
+ void *ret;
- libgl_handle = dlopen (path, RTLD_LAZY | RTLD_GLOBAL);
if (libgl_handle == NULL) {
- fprintf (stderr, "Error: Failed to dlopen %s\n", path);
- exit (1);
+ 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);
+ }
}
-}
-
-static void
-open_wrapper_handle (void)
-{
- const char *path;
- if (wrapper_handle)
- return;
+ ret = dlsym (libgl_handle, function);
- path = getenv ("GLAZE_WRAPPER");
- if (path == NULL) {
- fprintf (stderr, "GLAZE_WRAPPER unset. Please set to path of real libGL.so under glaze.\n");
+ if (ret == NULL) {
+ fprintf (stderr, "Error: glaze_lookup failed to dlsym %s\n",
+ function);
exit (1);
}
- wrapper_handle = dlopen (path, RTLD_LAZY);
- if (wrapper_handle == NULL) {
- fprintf (stderr, "Error: Failed to dlopen %s\n", path);
- exit (1);
- }
+ return ret;
}
-
-static void
-glaze_init (void) __attribute__((constructor));
-
-static void
-glaze_init (void)
-{
- open_libgl_handle ();
- open_wrapper_handle ();
-}
-
-static void *
-resolve (const char *name)
-{
- void *symbol;
-
- /* The wrapper gets first choice on all symbols. */
- symbol = dlsym (wrapper_handle, name);
- if (symbol)
- return symbol;
-
- return dlsym (libgl_handle, name);
-}
-
-#define GLAZE_API(name) \
-void * name() __attribute__((ifunc(#name "_resolver"))); \
-static void * \
-name ## _resolver (void) { return resolve (#name); }
-
-#include "specs/gl.def"
-#include "specs/glx.def"