Move xmalloc to the public side (libpolyp).

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@908 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/polyp/xmalloc.c

@@ -0,0 +1,123 @@
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2 of the License,
+  or (at your option) any later version.
+ 
+  polypaudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+ 
+  You should have received a copy of the GNU Lesser General Public License
+  along with polypaudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <signal.h>
+#include <assert.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <polypcore/util.h>
+#include <polypcore/gccmacro.h>
+
+#include "xmalloc.h"
+
+/* Make sure not to allocate more than this much memory. */
+#define MAX_ALLOC_SIZE (1024*1024*20) /* 20MB */
+
+/* #undef malloc */
+/* #undef free */
+/* #undef realloc */
+/* #undef strndup */
+/* #undef strdup */
+
+static void oom(void) PA_GCC_NORETURN;
+
+/** called in case of an OOM situation. Prints an error message and
+ * exits */
+static void oom(void) {
+    static const char e[] = "Not enough memory\n";
+    pa_loop_write(STDERR_FILENO, e, sizeof(e)-1);
+#ifdef SIGQUIT
+    raise(SIGQUIT);
+#endif
+    _exit(1);
+}
+
+void* pa_xmalloc(size_t size) {
+    void *p;
+    assert(size > 0);
+    assert(size < MAX_ALLOC_SIZE);
+    
+    if (!(p = malloc(size)))
+        oom();
+        
+    return p;
+}
+
+void* pa_xmalloc0(size_t size) {
+    void *p;
+    assert(size > 0);
+    assert(size < MAX_ALLOC_SIZE);
+    
+    if (!(p = calloc(1, size)))
+        oom();
+        
+    return p;
+}
+    
+void *pa_xrealloc(void *ptr, size_t size) {
+    void *p;
+    assert(size > 0);
+    assert(size < MAX_ALLOC_SIZE);
+    
+    if (!(p = realloc(ptr, size)))
+        oom();
+    return p;
+}
+
+void* pa_xmemdup(const void *p, size_t l) {
+    if (!p)
+        return NULL;
+    else {
+        char *r = pa_xmalloc(l);
+        memcpy(r, p, l);
+        return r;
+    }
+}
+
+char *pa_xstrdup(const char *s) {
+    if (!s)
+        return NULL;
+
+    return pa_xmemdup(s, strlen(s)+1);
+}
+
+char *pa_xstrndup(const char *s, size_t l) {
+    if (!s)
+        return NULL;
+    else {
+        char *r;
+        size_t t = strlen(s);
+
+        if (t > l)
+            t = l;
+        
+        r = pa_xmemdup(s, t+1);
+        r[t] = 0;
+        return r;
+    }
+}
+