When available, which is most of the time, use posix_memalign to implement

_mesa_align_malloc and friends.

configs/freebsd

@@ -15,7 +15,8 @@ COPY_LIBS = cp -f
 OPT_FLAGS  = -O2
 PIC_FLAGS  = -fPIC
 
-DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_BSD_SOURCE -DUSE_XSHM -DHZ=100
+DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_BSD_SOURCE -DUSE_XSHM \
+	-DHZ=100 -DHAVE_POSIX_MEMALIGN
 
 X11_INCLUDES = -I/usr/X11R6/include
 

configs/freebsd-dri

@@ -14,7 +14,7 @@ OPT_FLAGS = -O
 EXPAT_INCLUDES = -I/usr/local/include
 X11_INCLUDES = -I/usr/X11R6/include
 DEFINES = -DPTHREADS -DUSE_EXTERNAL_DXTN_LIB=1 -DIN_DRI_DRIVER \
-	-DGLX_DIRECT_RENDERING -DHAVE_ALIAS
+	-DGLX_DIRECT_RENDERING -DHAVE_ALIAS -DHAVE_POSIX_MEMALIGN
 
 CFLAGS = -Wmissing-prototypes -g -std=c99 -Wundef -fPIC -ffast-math \
 	$(ASM_FLAGS) $(X11_INCLUDES) $(DEFINES)

configs/linux

@@ -17,7 +17,7 @@ PIC_FLAGS  = -fPIC
 ARCH_FLAGS ?=
 
 DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE \
-	-D_BSD_SOURCE -DPTHREADS -DUSE_XSHM
+	-D_BSD_SOURCE -DPTHREADS -DUSE_XSHM -DHAVE_POSIX_MEMALIGN
 
 X11_INCLUDES = -I/usr/X11R6/include
 

configs/linux-dri

@@ -22,7 +22,7 @@ ARCH_FLAGS ?=
 DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE \
 	-D_BSD_SOURCE -D_GNU_SOURCE \
 	-DPTHREADS -DUSE_EXTERNAL_DXTN_LIB=1 -DIN_DRI_DRIVER \
-	-DGLX_DIRECT_RENDERING -DHAVE_ALIAS
+	-DGLX_DIRECT_RENDERING -DHAVE_ALIAS -DHAVE_POSIX_MEMALIGN
 
 X11_INCLUDES = -I/usr/X11R6/include
 

configs/linux-dri-xcb

@@ -22,7 +22,7 @@ ARCH_FLAGS ?=
 DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE \
 	-D_BSD_SOURCE -D_GNU_SOURCE \
 	-DPTHREADS -DUSE_EXTERNAL_DXTN_LIB=1 -DIN_DRI_DRIVER \
-	-DGLX_DIRECT_RENDERING -DHAVE_ALIAS -DUSE_XCB
+	-DGLX_DIRECT_RENDERING -DHAVE_ALIAS -DUSE_XCB -DHAVE_POSIX_MEMALIGN
 
 X11_INCLUDES = `pkg-config --cflags-only-I x11` `pkg-config --cflags-only-I xcb` `pkg-config --cflags-only-I xcb-glx`
 

configs/linux-indirect

@@ -23,7 +23,7 @@ ARCH_FLAGS ?=
 
 DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE \
 	-D_BSD_SOURCE -D_GNU_SOURCE \
-	-DPTHREADS -DHAVE_ALIAS
+	-DPTHREADS -DHAVE_ALIAS -DHAVE_POSIX_MEMALIGN
 
 X11_INCLUDES = -I/usr/X11R6/include
 

configs/linux-solo

@@ -16,7 +16,7 @@ PIC_FLAGS  = -fPIC
 ARCH_FLAGS ?=
 
 DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE \
-	-D_BSD_SOURCE -D_GNU_SOURCE \
+	-D_BSD_SOURCE -D_GNU_SOURCE -DHAVE_POSIX_MEMALIGN \
 	-DPTHREADS -DUSE_EXTERNAL_DXTN_LIB=1 -DDRM_USE_MALLOC -DIN_DRI_DRIVER
 
 CFLAGS   = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) \

configs/linux-sparc

@@ -12,7 +12,7 @@ WARN_FLAGS = -Wall
 OPT_FLAGS  = -O2
 PIC_FLAGS  = -fPIC
 
-DEFINES = -D_SVID_SOURCE -D_BSD_SOURCE -DUSE_XSHM
+DEFINES = -D_SVID_SOURCE -D_BSD_SOURCE -DUSE_XSHM -DHAVE_POSIX_MEMALIGN
 
 X11_INCLUDES = -I/usr/X11R6/include
 

src/mesa/main/imports.c

@@ -131,6 +131,12 @@ _mesa_free(void *ptr)
 void *
 _mesa_align_malloc(size_t bytes, unsigned long alignment)
 {
+#if defined(HAVE_POSIX_MEMALIGN) && !(defined(XFree86LOADER) && defined(IN_MODULE))
+   void *mem;
+
+   (void) posix_memalign(& mem, alignment, bytes);
+   return mem;
+#else
    uintptr_t ptr, buf;
 
    ASSERT( alignment > 0 );
@@ -151,6 +157,7 @@ _mesa_align_malloc(size_t bytes, unsigned long alignment)
 #endif
 
    return (void *) buf;
+#endif /* defined(HAVE_POSIX_MEMALIGN) && !(defined(XFree86LOADER) && defined(IN_MODULE)) */
 }
 
 /**
@@ -160,6 +167,16 @@ _mesa_align_malloc(size_t bytes, unsigned long alignment)
 void *
 _mesa_align_calloc(size_t bytes, unsigned long alignment)
 {
+#if defined(HAVE_POSIX_MEMALIGN) && !(defined(XFree86LOADER) && defined(IN_MODULE))
+   void *mem;
+   
+   mem = _mesa_align_malloc(bytes, alignment);
+   if (mem != NULL) {
+      (void) memset(mem, 0, bytes);
+   }
+
+   return mem;
+#else
    uintptr_t ptr, buf;
 
    ASSERT( alignment > 0 );
@@ -180,6 +197,7 @@ _mesa_align_calloc(size_t bytes, unsigned long alignment)
 #endif
 
    return (void *)buf;
+#endif /* defined(HAVE_POSIX_MEMALIGN) && !(defined(XFree86LOADER) && defined(IN_MODULE)) */
 }
 
 /**
@@ -192,13 +210,13 @@ _mesa_align_calloc(size_t bytes, unsigned long alignment)
 void
 _mesa_align_free(void *ptr)
 {
-#if 0
-   _mesa_free( (void *)(*(unsigned long *)((unsigned long)ptr - sizeof(void *))) );
+#if defined(HAVE_POSIX_MEMALIGN) && !(defined(XFree86LOADER) && defined(IN_MODULE))
+   free(ptr);
 #else
    void **cubbyHole = (void **) ((char *) ptr - sizeof(void *));
    void *realAddr = *cubbyHole;
    _mesa_free(realAddr);
-#endif
+#endif /* defined(HAVE_POSIX_MEMALIGN) && !(defined(XFree86LOADER) && defined(IN_MODULE)) */
 }
 
 /**