--- /dev/null
+/* -*- mode: C; c-file-style: "gnu" -*- */
+/* dbus-memory.c D-BUS memory handling
+ *
+ * Copyright (C) 2002 Red Hat Inc.
+ *
+ * Licensed under the Academic Free License version 1.2
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include "dbus-memory.h"
+#include <stdlib.h>
+
+/**
+ * @defgroup Memory Memory Allocation
+ * @ingroup DBus
+ * @brief dbus_malloc(), dbus_free(), etc.
+ *
+ * Functions and macros related to allocating and releasing
+ * blocks of memory.
+ *
+ * @{
+ */
+
+/**
+ * @def dbus_new
+ *
+ * Safe macro for using dbus_malloc(). Accepts the type
+ * to allocate and the number of type instances to
+ * allocate as arguments, and returns a memory block
+ * cast to the desired type, instead of as a void*.
+ *
+ * @param type type name to allocate
+ * @param count number of instances in the allocated array
+ * @returns the new memory block or NULL on failure
+ */
+
+/**
+ * @def dbus_new0
+ *
+ * Safe macro for using dbus_malloc0(). Accepts the type
+ * to allocate and the number of type instances to
+ * allocate as arguments, and returns a memory block
+ * cast to the desired type, instead of as a void*.
+ * The allocated array is initialized to all-bits-zero.
+ *
+ * @param type type name to allocate
+ * @param count number of instances in the allocated array
+ * @returns the new memory block or NULL on failure
+ */
+
+/**
+ * Allocates the given number of bytes, as with standard
+ * malloc(). Guaranteed to return NULL if bytes is zero
+ * on all platforms. Returns NULL if the allocation fails.
+ * The memory must be released with dbus_free().
+ *
+ * @param bytes number of bytes to allocate
+ * @return allocated memory, or NULL if the allocation fails.
+ */
+void*
+dbus_malloc (size_t bytes)
+{
+ if (bytes == 0) /* some system mallocs handle this, some don't */
+ return NULL;
+ else
+ return malloc (bytes);
+}
+
+/**
+ * Allocates the given number of bytes, as with standard malloc(), but
+ * all bytes are initialized to zero as with calloc(). Guaranteed to
+ * return NULL if bytes is zero on all platforms. Returns NULL if the
+ * allocation fails. The memory must be released with dbus_free().
+ *
+ * @param bytes number of bytes to allocate
+ * @return allocated memory, or NULL if the allocation fails.
+ */
+void*
+dbus_malloc0 (size_t bytes)
+{
+ if (bytes == 0)
+ return NULL;
+ else
+ return calloc (bytes, 1);
+}
+
+/**
+ * Resizes a block of memory previously allocated by dbus_malloc() or
+ * dbus_malloc0(). Guaranteed to free the memory and return NULL if bytes
+ * is zero on all platforms. Returns NULL if the resize fails.
+ * If the resize fails, the memory is not freed.
+ *
+ * @param memory block to be resized
+ * @param bytes new size of the memory block
+ * @return allocated memory, or NULL if the resize fails.
+ */
+void*
+dbus_realloc (void *memory,
+ size_t bytes)
+{
+ if (bytes == 0) /* guarantee this is safe */
+ {
+ dbus_free (memory);
+ return NULL;
+ }
+ else
+ {
+ return realloc (memory, bytes);
+ }
+}
+
+/**
+ * Frees a block of memory previously allocated by dbus_malloc() or
+ * dbus_malloc0().
+ *
+ * @param memory block to be freed
+ */
+void
+dbus_free (void *memory)
+{
+ if (memory) /* we guarantee it's safe to free (NULL) */
+ free (memory);
+}
+
+/** @} */
--- /dev/null
+/* -*- mode: C; c-file-style: "gnu" -*- */
+/* dbus-memory.h D-BUS memory handling
+ *
+ * Copyright (C) 2002 Red Hat Inc.
+ *
+ * Licensed under the Academic Free License version 1.2
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#if !defined (DBUS_INSIDE_DBUS_H) && !defined (DBUS_COMPILATION)
+#error "Only <dbus/dbus.h> can be included directly, this file may disappear or change contents."
+#endif
+
+#ifndef DBUS_MEMORY_H
+#define DBUS_MEMORY_H
+
+#include <dbus/dbus-macros.h>
+#include <sys/types.h> /* for size_t - is there a better header for this? */
+
+DBUS_BEGIN_DECLS
+
+void* dbus_malloc (size_t bytes);
+void* dbus_malloc0 (size_t bytes);
+void* dbus_realloc (void *memory,
+ size_t bytes);
+void dbus_free (void *memory);
+
+#define dbus_new(type, count) ((type*)dbus_malloc (sizeof (type) * (count)));
+#define dbus_new0(type, count) ((type*)dbus_malloc0 (sizeof (type) * (count)));
+
+DBUS_END_DECLS
+
+#endif /* DBUS_MESSAGE_H */
projects / platform / upstream / dbus.git / commitdiff