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egl: Move _eglPointerIsDereferencable() to eglglobals.[ch]

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Move _eglPointerIsDereferencable() to eglglobals.[ch] and make it a
non-static function so it can be used out of egldisplay.c

Signed-off-by: Miguel A. Vico <mvicomoya@nvidia.com>
Reviewed-by: James Jones <jajones@nvidia.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
This commit is contained in:
Miguel A. Vico 2017-07-19 17:25:08 -07:00 • committed by Emil Velikov
parent dad0c5d2d7
commit 045108938c
3 changed files with 37 additions and 33 deletions
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33
src/egl/main/egldisplay.c
View file

@ -49,10 +49,6 @@
#include "eglsync.h"
/* Includes for _eglNativePlatformDetectNativeDisplay */
#ifdef HAVE_MINCORE
#include <unistd.h>
#include <sys/mman.h>
#endif
#ifdef HAVE_WAYLAND_PLATFORM
#include <wayland-client.h>
#endif
@ -105,35 +101,6 @@ _eglGetNativePlatformFromEnv(void)
}
/**
* Perform validity checks on a generic pointer.
*/
static EGLBoolean
_eglPointerIsDereferencable(void *p)
{
#ifdef HAVE_MINCORE
uintptr_t addr = (uintptr_t) p;
unsigned char valid = 0;
const long page_size = getpagesize();
if (p == NULL)
return EGL_FALSE;
/* align addr to page_size */
addr &= ~(page_size - 1);
if (mincore((void *) addr, page_size, &valid) < 0) {
_eglLog(_EGL_DEBUG, "mincore failed: %m");
return EGL_FALSE;
}
return (valid & 0x01) == 0x01;
#else
return p != NULL;
#endif
}
/**
* Try detecting native platform with the help of native display characteristcs.
*/

31
src/egl/main/eglglobals.c
View file

@ -37,6 +37,12 @@
#include "eglglobals.h"
#include "egldisplay.h"
#include "egldriver.h"
#include "egllog.h"
#ifdef HAVE_MINCORE
#include <unistd.h>
#include <sys/mman.h>
#endif
static mtx_t _eglGlobalMutex = _MTX_INITIALIZER_NP;
@ -142,3 +148,28 @@ _eglGetClientExtensionString(void)
mtx_unlock(_eglGlobal.Mutex);
return ret;
}
EGLBoolean
_eglPointerIsDereferencable(void *p)
{
#ifdef HAVE_MINCORE
uintptr_t addr = (uintptr_t) p;
unsigned char valid = 0;
const long page_size = getpagesize();
if (p == NULL)
return EGL_FALSE;
/* align addr to page_size */
addr &= ~(page_size - 1);
if (mincore((void *) addr, page_size, &valid) < 0) {
_eglLog(_EGL_DEBUG, "mincore failed: %m");
return EGL_FALSE;
}
return (valid & 0x01) == 0x01;
#else
return p != NULL;
#endif
}

6
src/egl/main/eglglobals.h
View file

@ -87,4 +87,10 @@ static inline unsigned int DebugBitFromType(EGLenum type)
extern const char *
_eglGetClientExtensionString(void);
/**
* Perform validity checks on a generic pointer.
*/
extern EGLBoolean
_eglPointerIsDereferencable(void *p);
#endif /* EGLGLOBALS_INCLUDED */