#include <dlfcn.h>
#include <sys/types.h>
#include <dirent.h>
+#include <unistd.h>
#endif
static const char *
library_suffix(void)
{
- return "dll";
-}
-
-
-static EGLBoolean
-make_library_path(char *buf, unsigned int size, const char *name)
-{
- EGLBoolean need_suffix;
- const char *suffix = ".dll";
- int ret;
-
- need_suffix = (strchr(name, '.') == NULL);
- ret = snprintf(buf, size, "%s%s", name, (need_suffix) ? suffix : "");
-
- return ((unsigned int) ret < size);
+ return ".dll";
}
static const char *
library_suffix(void)
{
- return "so";
-}
-
-
-static EGLBoolean
-make_library_path(char *buf, unsigned int size, const char *name)
-{
- EGLBoolean need_dir, need_suffix;
- const char *suffix = ".so";
- int ret;
-
- need_dir = (strchr(name, '/') == NULL);
- need_suffix = (strchr(name, '.') == NULL);
-
- ret = snprintf(buf, size, "%s%s%s",
- (need_dir) ? _EGL_DRIVER_SEARCH_DIR"/" : "", name,
- (need_suffix) ? suffix : "");
-
- return ((unsigned int) ret < size);
+ return ".so";
}
#else /* _EGL_PLATFORM_NO_OS */
+
static const char DefaultDriverName[] = "builtin";
typedef void *lib_handle;
}
-static EGLBoolean
-make_library_path(char *buf, unsigned int size, const char *name)
-{
- int ret = snprintf(buf, size, name);
- return ((unsigned int) ret < size);
-}
-
-
#endif
mainFunc = (_EGLMain_t) GetProcAddress(lib, "_eglMain");
#elif defined(_EGL_PLATFORM_POSIX)
if (lib) {
- mainFunc = (_EGLMain_t) dlsym(lib, "_eglMain");
+ union {
+ _EGLMain_t func;
+ void *ptr;
+ } tmp = { NULL };
+ /* direct cast gives a warning when compiled with -pedantic */
+ tmp.ptr = dlsym(lib, "_eglMain");
+ mainFunc = tmp.func;
if (!mainFunc)
error = dlerror();
}
_EGLDriver *best_drv = NULL;
EGLint best_score = -1, i;
+ /*
+ * this function is called after preloading and the drivers never change
+ * after preloading.
+ */
for (i = 0; i < _eglGlobal.NumDrivers; i++) {
_EGLDriver *drv = _eglGlobal.Drivers[i];
EGLint score;
/**
- * Preload a user driver.
- *
- * A user driver can be specified by EGL_DRIVER.
+ * A loader function for use with _eglPreloadForEach. The loader data is the
+ * filename of the driver. This function stops on the first valid driver.
*/
static EGLBoolean
-_eglPreloadUserDriver(void)
+_eglLoaderFile(const char *dir, size_t len, void *loader_data)
{
-#if defined(_EGL_PLATFORM_POSIX) || defined(_EGL_PLATFORM_WINDOWS)
_EGLDriver *drv;
char path[1024];
- char *env;
+ const char *filename = (const char *) loader_data;
+ size_t flen = strlen(filename);
- env = getenv("EGL_DRIVER");
- if (!env)
- return EGL_FALSE;
-
- if (!make_library_path(path, sizeof(path), env))
- return EGL_FALSE;
+ /* make a full path */
+ if (len + flen + 2 > sizeof(path))
+ return EGL_TRUE;
+ if (len) {
+ memcpy(path, dir, len);
+ path[len++] = '/';
+ }
+ memcpy(path + len, filename, flen);
+ len += flen;
+ path[len] = '\0';
drv = _eglLoadDriver(path, NULL);
- if (!drv) {
- _eglLog(_EGL_WARNING, "EGL_DRIVER is set to an invalid driver");
- return EGL_FALSE;
+ /* fix the path and load again */
+ if (!drv && library_suffix()) {
+ const char *suffix = library_suffix();
+ size_t slen = strlen(suffix);
+ const char *p;
+ EGLBoolean need_suffix;
+
+ p = filename + flen - slen;
+ need_suffix = (p < filename || strcmp(p, suffix) != 0);
+ if (need_suffix && len + slen + 1 <= sizeof(path)) {
+ strcpy(path + len, suffix);
+ drv = _eglLoadDriver(path, NULL);
+ }
}
+ if (!drv)
+ return EGL_TRUE;
+ /* remember the driver and stop */
_eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
-
- return EGL_TRUE;
-#else /* _EGL_PLATFORM_POSIX || _EGL_PLATFORM_WINDOWS */
return EGL_FALSE;
-#endif
}
/**
- * Preload display drivers.
- *
- * Display drivers are a set of drivers that support a certain display system.
- * The display system may be specified by EGL_DISPLAY.
- *
- * FIXME This makes libEGL a memory hog if an user driver is not specified and
- * there are many display drivers.
+ * A loader function for use with _eglPreloadForEach. The loader data is the
+ * pattern (prefix) of the files to look for.
*/
static EGLBoolean
-_eglPreloadDisplayDrivers(void)
+_eglLoaderPattern(const char *dir, size_t len, void *loader_data)
{
#if defined(_EGL_PLATFORM_POSIX)
- const char *dpy, *suffix;
- char path[1024], prefix[32];
+ const char *prefix, *suffix;
+ size_t prefix_len, suffix_len;
DIR *dirp;
struct dirent *dirent;
+ char path[1024];
- dpy = getenv("EGL_DISPLAY");
- if (!dpy || !dpy[0])
- dpy = _EGL_DEFAULT_DISPLAY;
- if (!dpy || !dpy[0])
- return EGL_FALSE;
-
- snprintf(prefix, sizeof(prefix), "egl_%s_", dpy);
- suffix = library_suffix();
+ if (len + 2 > sizeof(path))
+ return EGL_TRUE;
+ if (len) {
+ memcpy(path, dir, len);
+ path[len++] = '/';
+ }
+ path[len] = '\0';
- dirp = opendir(_EGL_DRIVER_SEARCH_DIR);
+ dirp = opendir(path);
if (!dirp)
- return EGL_FALSE;
+ return EGL_TRUE;
+
+ prefix = (const char *) loader_data;
+ prefix_len = strlen(prefix);
+ suffix = library_suffix();
+ suffix_len = (suffix) ? strlen(suffix) : 0;
while ((dirent = readdir(dirp))) {
_EGLDriver *drv;
+ size_t dirent_len = strlen(dirent->d_name);
const char *p;
/* match the prefix */
- if (strncmp(dirent->d_name, prefix, strlen(prefix)) != 0)
+ if (strncmp(dirent->d_name, prefix, prefix_len) != 0)
continue;
-
/* match the suffix */
- p = strrchr(dirent->d_name, '.');
- if ((p && !suffix) || (!p && suffix))
- continue;
- else if (p && suffix && strcmp(p + 1, suffix) != 0)
- continue;
-
- snprintf(path, sizeof(path),
- _EGL_DRIVER_SEARCH_DIR"/%s", dirent->d_name);
+ if (suffix) {
+ p = dirent->d_name + dirent_len - suffix_len;
+ if (p < dirent->d_name || strcmp(p, suffix) != 0)
+ continue;
+ }
- drv = _eglLoadDriver(path, NULL);
- if (drv)
- _eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
+ /* make a full path and load the driver */
+ if (len + dirent_len + 1 <= sizeof(path)) {
+ strcpy(path + len, dirent->d_name);
+ drv = _eglLoadDriver(path, NULL);
+ if (drv)
+ _eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
+ }
}
closedir(dirp);
- return (_eglGlobal.NumDrivers > 0);
+ return EGL_TRUE;
#else /* _EGL_PLATFORM_POSIX */
+ /* stop immediately */
return EGL_FALSE;
#endif
}
/**
- * Preload the default driver.
+ * Run the preload function on each driver directory and return the number of
+ * drivers loaded.
+ *
+ * The process may end prematurely if the callback function returns false.
+ */
+static EGLint
+_eglPreloadForEach(const char *search_path,
+ EGLBoolean (*loader)(const char *, size_t, void *),
+ void *loader_data)
+{
+ const char *cur, *next;
+ size_t len;
+ EGLint num_drivers = _eglGlobal.NumDrivers;
+
+ cur = search_path;
+ while (cur) {
+ next = strchr(cur, ':');
+ len = (next) ? next - cur : strlen(cur);
+
+ if (!loader(cur, len, loader_data))
+ break;
+
+ cur = (next) ? next + 1 : NULL;
+ }
+
+ return (_eglGlobal.NumDrivers - num_drivers);
+}
+
+
+/**
+ * Return a list of colon-separated driver directories.
+ */
+static const char *
+_eglGetSearchPath(void)
+{
+ static const char *search_path;
+
+#if defined(_EGL_PLATFORM_POSIX) || defined(_EGL_PLATFORM_WINDOWS)
+ if (!search_path) {
+ static char buffer[1024];
+ const char *p;
+ int ret;
+
+ p = getenv("EGL_DRIVERS_PATH");
+#if defined(_EGL_PLATFORM_POSIX)
+ if (p && (geteuid() != getuid() || getegid() != getgid())) {
+ _eglLog(_EGL_DEBUG,
+ "ignore EGL_DRIVERS_PATH for setuid/setgid binaries");
+ p = NULL;
+ }
+#endif /* _EGL_PLATFORM_POSIX */
+
+ if (p) {
+ ret = snprintf(buffer, sizeof(buffer),
+ "%s:%s", p, _EGL_DRIVER_SEARCH_DIR);
+ if (ret > 0 && ret < sizeof(buffer))
+ search_path = buffer;
+ }
+ }
+ if (!search_path)
+ search_path = _EGL_DRIVER_SEARCH_DIR;
+#else
+ search_path = "";
+#endif
+
+ return search_path;
+}
+
+
+/**
+ * Preload a user driver.
+ *
+ * A user driver can be specified by EGL_DRIVER.
*/
static EGLBoolean
-_eglPreloadDefaultDriver(void)
+_eglPreloadUserDriver(void)
{
- _EGLDriver *drv;
- char path[1024];
+ const char *search_path = _eglGetSearchPath();
+ char *env;
- if (!make_library_path(path, sizeof(path), DefaultDriverName))
+ env = getenv("EGL_DRIVER");
+#if defined(_EGL_PLATFORM_POSIX)
+ if (env && strchr(env, '/')) {
+ search_path = "";
+ if ((geteuid() != getuid() || getegid() != getgid())) {
+ _eglLog(_EGL_DEBUG,
+ "ignore EGL_DRIVER for setuid/setgid binaries");
+ env = NULL;
+ }
+ }
+#endif /* _EGL_PLATFORM_POSIX */
+ if (!env)
return EGL_FALSE;
- drv = _eglLoadDriver(path, NULL);
- if (!drv)
+ if (!_eglPreloadForEach(search_path, _eglLoaderFile, (void *) env)) {
+ _eglLog(_EGL_WARNING, "EGL_DRIVER is set to an invalid driver");
return EGL_FALSE;
-
- _eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
+ }
return EGL_TRUE;
}
+/**
+ * Preload display drivers.
+ *
+ * Display drivers are a set of drivers that support a certain display system.
+ * The display system may be specified by EGL_DISPLAY.
+ *
+ * FIXME This makes libEGL a memory hog if an user driver is not specified and
+ * there are many display drivers.
+ */
+static EGLBoolean
+_eglPreloadDisplayDrivers(void)
+{
+ const char *dpy;
+ char prefix[32];
+ int ret;
+
+ dpy = getenv("EGL_DISPLAY");
+ if (!dpy || !dpy[0])
+ dpy = _EGL_DEFAULT_DISPLAY;
+ if (!dpy || !dpy[0])
+ return EGL_FALSE;
+
+ ret = snprintf(prefix, sizeof(prefix), "egl_%s_", dpy);
+ if (ret < 0 || ret >= sizeof(prefix))
+ return EGL_FALSE;
+
+ return (_eglPreloadForEach(_eglGetSearchPath(),
+ _eglLoaderPattern, (void *) prefix) > 0);
+}
+
+
+/**
+ * Preload the default driver.
+ */
+static EGLBoolean
+_eglPreloadDefaultDriver(void)
+{
+ return (_eglPreloadForEach(_eglGetSearchPath(),
+ _eglLoaderFile, (void *) DefaultDriverName) > 0);
+}
+
+
/**
* Preload drivers.
*
{
EGLBoolean loaded;
+ /* protect the preloading process */
+ _eglLockMutex(_eglGlobal.Mutex);
+
/* already preloaded */
- if (_eglGlobal.NumDrivers)
+ if (_eglGlobal.NumDrivers) {
+ _eglUnlockMutex(_eglGlobal.Mutex);
return EGL_TRUE;
+ }
loaded = (_eglPreloadUserDriver() ||
_eglPreloadDisplayDrivers() ||
_eglPreloadDefaultDriver());
+ _eglUnlockMutex(_eglGlobal.Mutex);
+
return loaded;
}
_eglUnloadDrivers(void)
{
EGLint i;
+
+ /* this is called at atexit time */
for (i = 0; i < _eglGlobal.NumDrivers; i++) {
_EGLDriver *drv = _eglGlobal.Drivers[i];
lib_handle handle = drv->LibHandle;
projects / mesa.git / blobdiff