+/**************************************************************************
+ *
+ * Copyright 2008 VMware, Inc.
+ * Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
+ * Copyright 2010-2011 LunarG, Inc.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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.
+ *
+ **************************************************************************/
+
+
/**
* Functions for choosing and opening/loading device drivers.
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
+#include "c11/threads.h"
-#include "eglstring.h"
#include "egldefines.h"
#include "egldisplay.h"
#include "egldriver.h"
#include "egllog.h"
-#include "eglmutex.h"
-
-#if defined(_EGL_OS_UNIX)
-#include <dlfcn.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <unistd.h>
-#endif
-
typedef struct _egl_module {
- char *Path;
- void *Handle;
+ char *Name;
+ _EGLMain_t BuiltIn;
_EGLDriver *Driver;
} _EGLModule;
-static _EGL_DECLARE_MUTEX(_eglModuleMutex);
+static mtx_t _eglModuleMutex = _MTX_INITIALIZER_NP;
static _EGLArray *_eglModules;
-
-/**
- * Wrappers for dlopen/dlclose()
- */
-#if defined(_EGL_OS_WINDOWS)
-
-
-typedef HMODULE lib_handle;
-
-static HMODULE
-open_library(const char *filename)
-{
- return LoadLibrary(filename);
-}
-
-static void
-close_library(HMODULE lib)
-{
- FreeLibrary(lib);
-}
-
-
-static const char *
-library_suffix(void)
-{
- return ".dll";
-}
-
-
-#elif defined(_EGL_OS_UNIX)
-
-
-typedef void * lib_handle;
-
-static void *
-open_library(const char *filename)
-{
- return dlopen(filename, RTLD_LAZY);
-}
-
-static void
-close_library(void *lib)
-{
- dlclose(lib);
-}
-
-
-static const char *
-library_suffix(void)
-{
- return ".so";
-}
-
-
+const struct {
+ const char *name;
+ _EGLMain_t main;
+} _eglBuiltInDrivers[] = {
+#ifdef _EGL_BUILT_IN_DRIVER_DRI2
+ { "egl_dri2", _eglBuiltInDriverDRI2 },
#endif
-
-
-/**
- * Open the named driver and find its bootstrap function: _eglMain().
- */
-static _EGLMain_t
-_eglOpenLibrary(const char *driverPath, lib_handle *handle)
-{
- lib_handle lib;
- _EGLMain_t mainFunc = NULL;
- const char *error = "unknown error";
-
- assert(driverPath);
-
- _eglLog(_EGL_DEBUG, "dlopen(%s)", driverPath);
- lib = open_library(driverPath);
-
-#if defined(_EGL_OS_WINDOWS)
- /* XXX untested */
- if (lib)
- mainFunc = (_EGLMain_t) GetProcAddress(lib, "_eglMain");
-#elif defined(_EGL_OS_UNIX)
- if (lib) {
- 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();
- }
- else {
- error = dlerror();
- }
+#ifdef _EGL_BUILT_IN_DRIVER_HAIKU
+ { "egl_haiku", _eglBuiltInDriverHaiku },
#endif
-
- if (!lib) {
- _eglLog(_EGL_WARNING, "Could not open driver %s (%s)",
- driverPath, error);
- if (!getenv("EGL_DRIVER"))
- _eglLog(_EGL_WARNING,
- "The driver can be overridden by setting EGL_DRIVER");
- return NULL;
- }
-
- if (!mainFunc) {
- _eglLog(_EGL_WARNING, "_eglMain not found in %s (%s)",
- driverPath, error);
- if (lib)
- close_library(lib);
- return NULL;
- }
-
- *handle = lib;
- return mainFunc;
-}
-
+ { NULL, NULL }
+};
/**
* Load a module and create the driver object.
static EGLBoolean
_eglLoadModule(_EGLModule *mod)
{
- _EGLMain_t mainFunc;
- lib_handle lib;
_EGLDriver *drv;
- mainFunc = _eglOpenLibrary(mod->Path, &lib);
- if (!mainFunc)
- return EGL_FALSE;
+ if (mod->Driver)
+ return EGL_TRUE;
- drv = mainFunc(NULL);
- if (!drv) {
- if (lib)
- close_library(lib);
- return EGL_FALSE;
- }
+ if (!mod->BuiltIn)
+ return EGL_FALSE;
- if (!drv->Name) {
- _eglLog(_EGL_WARNING, "Driver loaded from %s has no name", mod->Path);
- drv->Name = "UNNAMED";
- }
+ drv = mod->BuiltIn(NULL);
+ if (!drv || !drv->Name)
+ return EGL_FALSE;
- mod->Handle = (void *) lib;
mod->Driver = drv;
return EGL_TRUE;
/* destroy the driver */
if (mod->Driver && mod->Driver->Unload)
mod->Driver->Unload(mod->Driver);
- if (mod->Handle)
- close_library(mod->Handle);
mod->Driver = NULL;
- mod->Handle = NULL;
}
* Add a module to the module array.
*/
static _EGLModule *
-_eglAddModule(const char *path)
+_eglAddModule(const char *name)
{
_EGLModule *mod;
EGLint i;
/* find duplicates */
for (i = 0; i < _eglModules->Size; i++) {
mod = _eglModules->Elements[i];
- if (strcmp(mod->Path, path) == 0)
+ if (strcmp(mod->Name, name) == 0)
return mod;
}
/* allocate a new one */
mod = calloc(1, sizeof(*mod));
if (mod) {
- mod->Path = _eglstrdup(path);
- if (!mod->Path) {
+ mod->Name = strdup(name);
+ if (!mod->Name) {
free(mod);
mod = NULL;
}
}
if (mod) {
_eglAppendArray(_eglModules, (void *) mod);
- _eglLog(_EGL_DEBUG, "added %s to module array", mod->Path);
+ _eglLog(_EGL_DEBUG, "added %s to module array", mod->Name);
}
return mod;
_EGLModule *mod = (_EGLModule *) module;
_eglUnloadModule(mod);
- free(mod->Path);
+ free(mod->Name);
free(mod);
}
-/**
- * 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
-_eglLoaderFile(const char *dir, size_t len, void *loader_data)
-{
- char path[1024];
- const char *filename = (const char *) loader_data;
- size_t flen = strlen(filename);
-
- /* 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';
-
- if (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) {
- /* overflow */
- if (len + slen + 1 > sizeof(path))
- return EGL_TRUE;
- strcpy(path + len, suffix);
- }
- }
-
-#if defined(_EGL_OS_UNIX)
- /* check if the file exists */
- if (access(path, F_OK))
- return EGL_TRUE;
-#endif
-
- _eglAddModule(path);
-
- return EGL_TRUE;
-}
-
-
-/**
- * A loader function for use with _eglPreloadForEach. The loader data is the
- * pattern (prefix) of the files to look for.
- */
-static EGLBoolean
-_eglLoaderPattern(const char *dir, size_t len, void *loader_data)
-{
-#if defined(_EGL_OS_UNIX)
- const char *prefix, *suffix;
- size_t prefix_len, suffix_len;
- DIR *dirp;
- struct dirent *dirent;
- char path[1024];
-
- if (len + 2 > sizeof(path))
- return EGL_TRUE;
- if (len) {
- memcpy(path, dir, len);
- path[len++] = '/';
- }
- path[len] = '\0';
-
- dirp = opendir(path);
- if (!dirp)
- 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))) {
- size_t dirent_len = strlen(dirent->d_name);
- const char *p;
-
- /* match the prefix */
- if (strncmp(dirent->d_name, prefix, prefix_len) != 0)
- continue;
- /* match the suffix */
- if (suffix) {
- p = dirent->d_name + dirent_len - suffix_len;
- if (p < dirent->d_name || strcmp(p, suffix) != 0)
- continue;
- }
-
- /* make a full path and add it to the module array */
- if (len + dirent_len + 1 <= sizeof(path)) {
- strcpy(path + len, dirent->d_name);
- _eglAddModule(path);
- }
- }
-
- closedir(dirp);
-
- return EGL_TRUE;
-#else /* _EGL_OS_UNIX */
- /* stop immediately */
- return EGL_FALSE;
-#endif
-}
-
-
-/**
- * Run the callback function on each driver directory.
- *
- * The process may end prematurely if the callback function returns false.
- */
-static void
-_eglPreloadForEach(const char *search_path,
- EGLBoolean (*loader)(const char *, size_t, void *),
- void *loader_data)
-{
- const char *cur, *next;
- size_t len;
-
- 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 a list of colon-separated driver directories.
- */
-static const char *
-_eglGetSearchPath(void)
-{
- static const char *search_path;
-
-#if defined(_EGL_OS_UNIX) || defined(_EGL_OS_WINDOWS)
- if (!search_path) {
- static char buffer[1024];
- const char *p;
- int ret;
-
- p = getenv("EGL_DRIVERS_PATH");
-#if defined(_EGL_OS_UNIX)
- if (p && (geteuid() != getuid() || getegid() != getgid())) {
- _eglLog(_EGL_DEBUG,
- "ignore EGL_DRIVERS_PATH for setuid/setgid binaries");
- p = NULL;
- }
-#endif /* _EGL_OS_UNIX */
-
- if (p) {
- ret = _eglsnprintf(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;
-}
-
-
/**
* Add the user driver to the module array.
*
* The user driver is specified by EGL_DRIVER.
*/
-static void
+static EGLBoolean
_eglAddUserDriver(void)
{
- const char *search_path = _eglGetSearchPath();
char *env;
env = getenv("EGL_DRIVER");
-#if defined(_EGL_OS_UNIX)
- if (env && strchr(env, '/')) {
- search_path = "";
- if ((geteuid() != getuid() || getegid() != getgid())) {
- _eglLog(_EGL_DEBUG,
- "ignore EGL_DRIVER for setuid/setgid binaries");
- env = NULL;
+ if (env) {
+ EGLint i;
+
+ for (i = 0; _eglBuiltInDrivers[i].name; i++) {
+ if (!strcmp(_eglBuiltInDrivers[i].name, env)) {
+ _EGLModule *mod = _eglAddModule(env);
+ if (mod)
+ mod->BuiltIn = _eglBuiltInDrivers[i].main;
+
+ return EGL_TRUE;
+ }
}
}
-#endif /* _EGL_OS_UNIX */
- if (env)
- _eglPreloadForEach(search_path, _eglLoaderFile, (void *) env);
+
+ return EGL_FALSE;
}
/**
- * Add default drivers to the module array.
+ * Add built-in drivers to the module array.
*/
static void
-_eglAddDefaultDrivers(void)
+_eglAddBuiltInDrivers(void)
{
- const char *search_path = _eglGetSearchPath();
+ _EGLModule *mod;
EGLint i;
-#if defined(_EGL_OS_WINDOWS)
- const char *DefaultDriverNames[] = {
- "egl_gallium"
- };
-#elif defined(_EGL_OS_UNIX)
- const char *DefaultDriverNames[] = {
- "egl_gallium",
- "egl_dri2",
- "egl_glx"
- };
-#endif
- for (i = 0; i < ARRAY_SIZE(DefaultDriverNames); i++) {
- void *name = (void *) DefaultDriverNames[i];
- _eglPreloadForEach(search_path, _eglLoaderFile, name);
+ for (i = 0; _eglBuiltInDrivers[i].name; i++) {
+ mod = _eglAddModule(_eglBuiltInDrivers[i].name);
+ if (mod)
+ mod->BuiltIn = _eglBuiltInDrivers[i].main;
}
}
if (_eglModules)
return EGL_TRUE;
- /* the order here decides the priorities of the drivers */
- _eglAddUserDriver();
- _eglAddDefaultDrivers();
- _eglPreloadForEach(_eglGetSearchPath(), _eglLoaderPattern, (void *) "egl_");
+ if (!_eglAddUserDriver()) {
+ /*
+ * Add other drivers only when EGL_DRIVER is not set. The order here
+ * decides the priorities.
+ */
+ _eglAddBuiltInDrivers();
+ }
return (_eglModules != NULL);
}
/**
- * Match a display to a driver. The display is initialized unless use_probe is
- * true.
- *
- * The matching is done by finding the first driver that can initialize the
- * display, or when use_probe is true, the driver with highest score.
+ * A helper function for _eglMatchDriver. It finds the first driver that can
+ * initialize the display and return.
*/
-_EGLDriver *
-_eglMatchDriver(_EGLDisplay *dpy, EGLBoolean use_probe)
+static _EGLDriver *
+_eglMatchAndInitialize(_EGLDisplay *dpy)
{
- _EGLModule *mod;
- _EGLDriver *best_drv = NULL;
- EGLint best_score = 0;
- EGLint major, minor, i;
-
- _eglLockMutex(&_eglModuleMutex);
+ _EGLDriver *drv = NULL;
+ EGLint i = 0;
if (!_eglAddDrivers()) {
- _eglUnlockMutex(&_eglModuleMutex);
- return EGL_FALSE;
+ _eglLog(_EGL_WARNING, "failed to find any driver");
+ return NULL;
}
- /* match the loaded modules */
- for (i = 0; i < _eglModules->Size; i++) {
- mod = (_EGLModule *) _eglModules->Elements[i];
- if (!mod->Driver)
- break;
+ if (dpy->Driver) {
+ drv = dpy->Driver;
+ /* no re-matching? */
+ if (!drv->API.Initialize(drv, dpy))
+ drv = NULL;
+ return drv;
+ }
- if (use_probe) {
- EGLint score = (mod->Driver->Probe) ?
- mod->Driver->Probe(mod->Driver, dpy) : 1;
- if (score > best_score) {
- best_drv = mod->Driver;
- best_score = score;
- }
+ while (i < _eglModules->Size) {
+ _EGLModule *mod = (_EGLModule *) _eglModules->Elements[i];
+
+ if (!_eglLoadModule(mod)) {
+ /* remove invalid modules */
+ _eglEraseArray(_eglModules, i, _eglFreeModule);
+ continue;
+ }
+
+ if (mod->Driver->API.Initialize(mod->Driver, dpy)) {
+ drv = mod->Driver;
+ break;
}
else {
- if (mod->Driver->API.Initialize(mod->Driver, dpy, &major, &minor)) {
- best_drv = mod->Driver;
- best_score = 100;
- }
+ i++;
}
- /* perfect match */
- if (best_score >= 100)
- break;
}
- /* load more modules */
- if (!best_drv) {
- EGLint first_unloaded = i;
+ return drv;
+}
- while (i < _eglModules->Size) {
- mod = (_EGLModule *) _eglModules->Elements[i];
- assert(!mod->Driver);
- if (!_eglLoadModule(mod)) {
- /* remove invalid modules */
- _eglEraseArray(_eglModules, i, _eglFreeModule);
- continue;
- }
+/**
+ * Match a display to a driver. The display is initialized unless test_only is
+ * true. The matching is done by finding the first driver that can initialize
+ * the display.
+ */
+_EGLDriver *
+_eglMatchDriver(_EGLDisplay *dpy, EGLBoolean test_only)
+{
+ _EGLDriver *best_drv;
- if (use_probe) {
- best_score = (mod->Driver->Probe) ?
- mod->Driver->Probe(mod->Driver, dpy) : 1;
- }
- else {
- if (mod->Driver->API.Initialize(mod->Driver, dpy, &major, &minor))
- best_score = 100;
- }
+ assert(!dpy->Initialized);
- if (best_score > 0) {
- best_drv = mod->Driver;
- /* loaded modules come before unloaded ones */
- if (first_unloaded != i) {
- void *tmp = _eglModules->Elements[i];
- _eglModules->Elements[i] =
- _eglModules->Elements[first_unloaded];
- _eglModules->Elements[first_unloaded] = tmp;
- }
- break;
- }
- else {
- _eglUnloadModule(mod);
- i++;
- }
- }
+ mtx_lock(&_eglModuleMutex);
+
+ /* set options */
+ dpy->Options.TestOnly = test_only;
+ dpy->Options.UseFallback = EGL_FALSE;
+
+ best_drv = _eglMatchAndInitialize(dpy);
+ if (!best_drv) {
+ dpy->Options.UseFallback = EGL_TRUE;
+ best_drv = _eglMatchAndInitialize(dpy);
}
- _eglUnlockMutex(&_eglModuleMutex);
+ mtx_unlock(&_eglModuleMutex);
if (best_drv) {
- _eglLog(_EGL_DEBUG, "the best driver is %s (score %d)",
- best_drv->Name, best_score);
- if (!use_probe) {
+ _eglLog(_EGL_DEBUG, "the best driver is %s%s",
+ best_drv->Name, (test_only) ? " (test only) " : "");
+ if (!test_only) {
dpy->Driver = best_drv;
dpy->Initialized = EGL_TRUE;
- dpy->APImajor = major;
- dpy->APIminor = minor;
}
}
{
/* this is called at atexit time */
if (_eglModules) {
-#if defined(_EGL_OS_UNIX)
_eglDestroyArray(_eglModules, _eglFreeModule);
-#elif defined(_EGL_OS_WINDOWS)
- /* XXX Windows unloads DLLs before atexit */
- _eglDestroyArray(_eglModules, NULL);
-#endif
_eglModules = NULL;
}
}
-
-
-/**
- * Invoke a callback function on each EGL search path.
- *
- * The first argument of the callback function is the name of the search path.
- * The second argument is the length of the name.
- */
-void
-_eglSearchPathForEach(EGLBoolean (*callback)(const char *, size_t, void *),
- void *callback_data)
-{
- const char *search_path = _eglGetSearchPath();
- _eglPreloadForEach(search_path, callback, callback_data);
-}
projects / mesa.git / blobdiff