Index: speex/libspeex/stack_alloc.h |
=================================================================== |
--- speex/libspeex/stack_alloc.h (revision 0) |
+++ speex/libspeex/stack_alloc.h (revision 0) |
@@ -0,0 +1,115 @@ |
+/* Copyright (C) 2002 Jean-Marc Valin */ |
+/** |
+ @file stack_alloc.h |
+ @brief Temporary memory allocation on stack |
+*/ |
+/* |
+ Redistribution and use in source and binary forms, with or without |
+ modification, are permitted provided that the following conditions |
+ are met: |
+ |
+ - Redistributions of source code must retain the above copyright |
+ notice, this list of conditions and the following disclaimer. |
+ |
+ - Redistributions in binary form must reproduce the above copyright |
+ notice, this list of conditions and the following disclaimer in the |
+ documentation and/or other materials provided with the distribution. |
+ |
+ - Neither the name of the Xiph.org Foundation nor the names of its |
+ contributors may be used to endorse or promote products derived from |
+ this software without specific prior written permission. |
+ |
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
+ CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
+ EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
+ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
+ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
+*/ |
+ |
+#ifndef STACK_ALLOC_H |
+#define STACK_ALLOC_H |
+ |
+#ifdef USE_ALLOCA |
+# ifdef WIN32 |
+# include <malloc.h> |
+# else |
+# ifdef HAVE_ALLOCA_H |
+# include <alloca.h> |
+# else |
+# include <stdlib.h> |
+# endif |
+# endif |
+#endif |
+ |
+/** |
+ * @def ALIGN(stack, size) |
+ * |
+ * Aligns the stack to a 'size' boundary |
+ * |
+ * @param stack Stack |
+ * @param size New size boundary |
+ */ |
+ |
+/** |
+ * @def PUSH(stack, size, type) |
+ * |
+ * Allocates 'size' elements of type 'type' on the stack |
+ * |
+ * @param stack Stack |
+ * @param size Number of elements |
+ * @param type Type of element |
+ */ |
+ |
+/** |
+ * @def VARDECL(var) |
+ * |
+ * Declare variable on stack |
+ * |
+ * @param var Variable to declare |
+ */ |
+ |
+/** |
+ * @def ALLOC(var, size, type) |
+ * |
+ * Allocate 'size' elements of 'type' on stack |
+ * |
+ * @param var Name of variable to allocate |
+ * @param size Number of elements |
+ * @param type Type of element |
+ */ |
+ |
+#ifdef ENABLE_VALGRIND |
+ |
+#include <valgrind/memcheck.h> |
+ |
+#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1)) |
+ |
+#define PUSH(stack, size, type) (VALGRIND_MAKE_NOACCESS(stack, 1000),ALIGN((stack),sizeof(type)),VALGRIND_MAKE_WRITABLE(stack, ((size)*sizeof(type))),(stack)+=((size)*sizeof(type)),(type*)((stack)-((size)*sizeof(type)))) |
+ |
+#else |
+ |
+#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1)) |
+ |
+#define PUSH(stack, size, type) (ALIGN((stack),sizeof(type)),(stack)+=((size)*sizeof(type)),(type*)((stack)-((size)*sizeof(type)))) |
+ |
+#endif |
+ |
+#if defined(VAR_ARRAYS) |
+#define VARDECL(var) |
+#define ALLOC(var, size, type) type var[size] |
+#elif defined(USE_ALLOCA) |
+#define VARDECL(var) var |
+#define ALLOC(var, size, type) var = alloca(sizeof(type)*(size)) |
+#else |
+#define VARDECL(var) var |
+#define ALLOC(var, size, type) var = PUSH(stack, size, type) |
+#endif |
+ |
+ |
+#endif |
Property changes on: speex/libspeex/stack_alloc.h |
___________________________________________________________________ |
Name: svn:executable |
+ * |