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

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;
+}

src/util/Alloc.hxx

@@ -0,0 +1,67 @@
+/*
+ * 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.
+ */
+
+#ifndef MPD_ALLOC_HXX
+#define MPD_ALLOC_HXX
+
+#include "Compiler.h"
+
+#include <stddef.h>
+
+/**
+ * Allocate memory.  Use free() to free it.
+ *
+ * This function never fails; in out-of-memory situations, it aborts
+ * the process.
+ */
+gcc_malloc
+void *
+xalloc(size_t size);
+
+/**
+ * Duplicate memory.  Use free() to free it.
+ *
+ * This function never fails; in out-of-memory situations, it aborts
+ * the process.
+ */
+gcc_malloc gcc_nonnull_all
+void *
+xmemdup(const void *s, size_t size);
+
+/**
+ * Duplicate a string.  Use free() to free it.
+ *
+ * This function never fails; in out-of-memory situations, it aborts
+ * the process.
+ */
+gcc_malloc gcc_nonnull_all
+char *
+xstrdup(const char *s);
+
+/**
+ * Duplicate a string.  Use free() to free it.
+ *
+ * This function never fails; in out-of-memory situations, it aborts
+ * the process.
+ */
+gcc_malloc gcc_nonnull_all
+char *
+xstrndup(const char *s, size_t n);
+
+#endif

src/util/VarSize.hxx

@@ -30,14 +30,13 @@
 #ifndef MPD_VAR_SIZE_HXX
 #define MPD_VAR_SIZE_HXX
 
+#include "Alloc.hxx"
 #include "Compiler.h"
 
 #include <type_traits>
 #include <utility>
 #include <new>
 
-#include <glib.h>
-
 /**
  * Allocate and construct a variable-size object.  That is useful for
  * example when you want to store a variable-length string as the last
@@ -61,7 +60,7 @@ NewVarSize(size_t declared_tail_size, size_t real_tail_size, Args&&... args)
 	size_t size = sizeof(T) - declared_tail_size + real_tail_size;
 
 	/* allocate memory */
-	T *instance = (T *)g_malloc(size);
+	T *instance = (T *)xalloc(size);
 
 	/* call the constructor */
 	new(instance) T(std::forward<Args>(args)...);
@@ -78,7 +77,7 @@ DeleteVarSize(T *instance)
 	instance->T::~T();
 
 	/* free memory */
-	g_free(instance);
+	free(instance);
 }
 
 #endif