util/Alloc: new library replacing GLib's g_malloc()

1 files changed, 76 insertions, 0 deletions

diff --git a/src/util/Alloc.cxx b/src/util/Alloc.cxx
new file mode 100644
index 000000000..ec3579470
--- /dev/null
+++ b/src/util/Alloc.cxx
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "Alloc.hxx"
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+gcc_noreturn
+static void
+oom()
+{
+	(void)write(STDERR_FILENO, "Out of memory\n", 14);
+	_exit(1);
+}
+
+void *
+xalloc(size_t size)
+{
+	void *p = malloc(size);
+	if (gcc_unlikely(p == nullptr))
+		oom();
+
+	return p;
+}
+
+void *
+xmemdup(const void *s, size_t size)
+{
+	void *p = xalloc(size);
+	memcpy(p, s, size);
+	return p;
+}
+
+char *
+xstrdup(const char *s)
+{
+	char *p = strdup(s);
+	if (gcc_unlikely(p == nullptr))
+		oom();
+
+	return p;
+}
+
+char *
+xstrndup(const char *s, size_t n)
+{
+#ifdef WIN32
+	char *p = (char *)xalloc(n + 1);
+	memcpy(p, s, n);
+	p[n] = 0;
+#else
+	char *p = strndup(s, n);
+	if (gcc_unlikely(p == nullptr))
+		oom();
+#endif
+
+	return p;
+}