X-Git-Url: https://git.libre-soc.org/?p=mesa.git;a=blobdiff_plain;f=src%2Fegl%2Fmain%2Feglglobals.c;h=f39cbfe4489b07e74caa434246d66c5b14efca0b;hp=5182b18e226f0e9443abf8dcc5dfc569ab62e141;hb=a38e21d6683aeecb51aea4f933a77c6e7f1a6179;hpb=653a83445f94620673f747a4ace6847a2c7fdb4d

diff --git a/src/egl/main/eglglobals.c b/src/egl/main/eglglobals.c
index 5182b18e226..f39cbfe4489 100644
--- a/src/egl/main/eglglobals.c
+++ b/src/egl/main/eglglobals.c
@@ -1,28 +1,105 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+
 #include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
 #include <assert.h>
+#include "c11/threads.h"
+
 #include "eglglobals.h"
+#include "egldevice.h"
 #include "egldisplay.h"
 #include "egldriver.h"
-#include "eglmutex.h"
 
+#include "util/macros.h"
+
+#ifdef HAVE_MINCORE
+#include <unistd.h>
+#include <sys/mman.h>
+#endif
 
-#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
 
+static mtx_t _eglGlobalMutex = _MTX_INITIALIZER_NP;
 
-static _EGL_DECLARE_MUTEX(_eglGlobalMutex);
 struct _egl_global _eglGlobal =
 {
-   &_eglGlobalMutex,       /* Mutex */
-   NULL,                   /* DisplayList */
-   1,                      /* FreeScreenHandle */
-   0,                      /* NumDrivers */
-   { NULL },               /* Drivers */
-   2,                      /* NumAtExitCalls */
-   {
+   .Mutex = &_eglGlobalMutex,
+   .DisplayList = NULL,
+   .DeviceList = &_eglSoftwareDevice,
+   .NumAtExitCalls = 3,
+   .AtExitCalls = {
       /* default AtExitCalls, called in reverse order */
-      _eglUnloadDrivers, /* always called last */
-      _eglFiniDisplay
+      _eglFiniDevice, /* always called last */
+      _eglUnloadDrivers,
+      _eglFiniDisplay,
    },
+
+#if USE_LIBGLVND
+   .ClientOnlyExtensionString =
+#else
+   .ClientExtensionString =
+#endif
+   "EGL_EXT_client_extensions"
+   " EGL_EXT_device_base"
+   " EGL_EXT_device_enumeration"
+   " EGL_EXT_device_query"
+   " EGL_EXT_platform_base"
+   " EGL_KHR_client_get_all_proc_addresses"
+   " EGL_KHR_debug"
+
+#if USE_LIBGLVND
+   ,
+   .PlatformExtensionString =
+#else
+   " "
+#endif
+
+   "EGL_EXT_platform_device"
+#ifdef HAVE_WAYLAND_PLATFORM
+   " EGL_EXT_platform_wayland"
+   " EGL_KHR_platform_wayland"
+#endif
+#ifdef HAVE_X11_PLATFORM
+   " EGL_EXT_platform_x11"
+   " EGL_KHR_platform_x11"
+#endif
+#ifdef HAVE_DRM_PLATFORM
+   " EGL_MESA_platform_gbm"
+   " EGL_KHR_platform_gbm"
+#endif
+   " EGL_MESA_platform_surfaceless"
+   "",
+
+   .debugCallback = NULL,
+   .debugTypesEnabled = _EGL_DEBUG_BIT_CRITICAL | _EGL_DEBUG_BIT_ERROR,
 };
 
 
@@ -41,7 +118,7 @@ _eglAddAtExitCall(void (*func)(void))
    if (func) {
       static EGLBoolean registered = EGL_FALSE;
 
-      _eglLockMutex(_eglGlobal.Mutex);
+      mtx_lock(_eglGlobal.Mutex);
 
       if (!registered) {
          atexit(_eglAtExit);
@@ -51,6 +128,42 @@ _eglAddAtExitCall(void (*func)(void))
       assert(_eglGlobal.NumAtExitCalls < ARRAY_SIZE(_eglGlobal.AtExitCalls));
       _eglGlobal.AtExitCalls[_eglGlobal.NumAtExitCalls++] = func;
 
-      _eglUnlockMutex(_eglGlobal.Mutex);
+      mtx_unlock(_eglGlobal.Mutex);
    }
 }
+
+EGLBoolean
+_eglPointerIsDereferencable(void *p)
+{
+   uintptr_t addr = (uintptr_t) p;
+   const long page_size = getpagesize();
+#ifdef HAVE_MINCORE
+   unsigned char valid = 0;
+
+   if (p == NULL)
+      return EGL_FALSE;
+
+   /* align addr to page_size */
+   addr &= ~(page_size - 1);
+
+   if (mincore((void *) addr, page_size, &valid) < 0) {
+      return EGL_FALSE;
+   }
+
+   /* mincore() returns 0 on success, and -1 on failure.  The last parameter
+    * is a vector of bytes with one entry for each page queried.  mincore
+    * returns page residency information in the first bit of each byte in the
+    * vector.
+    *
+    * Residency doesn't actually matter when determining whether a pointer is
+    * dereferenceable, so the output vector can be ignored.  What matters is
+    * whether mincore succeeds. See:
+    *
+    *   http://man7.org/linux/man-pages/man2/mincore.2.html
+    */
+   return EGL_TRUE;
+#else
+   // Without mincore(), we just assume that the first page is unmapped.
+   return addr >= page_size;
+#endif
+}