#include "gmessages.h"
#include "gstdio.h"
#include "gstrfuncs.h"
+#include "gatomic.h"
#include "glibintl.h"
{
gsize length;
gchar *contents;
+ int ref_count;
#ifdef G_OS_WIN32
HANDLE mapping;
#endif
* will not be modified, or if all modifications of the file are done
* atomically (e.g. using g_file_set_contents()).
*
- * Return value: a newly allocated #GMappedFile which must be freed
- * with g_mapped_file_free(), or %NULL if the mapping failed.
+ * Return value: a newly allocated #GMappedFile which must be unref'd
+ * with g_mapped_file_unref(), or %NULL if the mapping failed.
*
* Since: 2.8
*/
return NULL;
}
- file = g_new0 (GMappedFile, 1);
+ file = g_slice_new0 (GMappedFile);
+ file->ref_count = 1;
if (fstat (fd, &st) == -1)
{
out:
close (fd);
- g_free (file);
+ g_slice_free (GMappedFile, file);
return NULL;
}
* g_mapped_file_free:
* @file: a #GMappedFile
*
- * Unmaps the buffer of @file and frees it.
+ * This call existed before #GMappedFile had refcounting and is currently
+ * exactly the same as g_mapped_file_unref().
*
* Since: 2.8
+ * Deprecated:2.22: Use g_mapped_file_unref() instead.
*/
void
g_mapped_file_free (GMappedFile *file)
{
+ g_mapped_file_unref (file);
+}
+
+/**
+ * g_mapped_file_ref:
+ * @file: a #GMappedFile
+ *
+ * Increments the reference count of @file by one. It is safe to call
+ * this function from any thread.
+ *
+ * Return value: the passed in #GMappedFile.
+ *
+ * Since: 2.22
+ **/
+GMappedFile *
+g_mapped_file_ref (GMappedFile *file)
+{
+ g_return_val_if_fail (file != NULL, NULL);
+ g_return_val_if_fail (file->ref_count > 0, file);
+
+ g_atomic_int_inc (&file->ref_count);
+
+ return file;
+}
+
+/**
+ * g_mapped_file_unref:
+ * @file: a #GMappedFile
+ *
+ * Decrements the reference count of @file by one. If the reference count
+ * drops to 0, unmaps the buffer of @file and frees it.
+ *
+ * It is safe to call this function from any thread.
+ *
+ * Since 2.22
+ **/
+void
+g_mapped_file_unref (GMappedFile *file)
+{
g_return_if_fail (file != NULL);
+ g_return_if_fail (file->ref_count > 0);
- if (file->length)
- {
+ if (g_atomic_int_dec_and_test (&file->ref_count))
+ {
+ if (file->length)
+ {
#ifdef HAVE_MMAP
- munmap (file->contents, file->length);
+ munmap (file->contents, file->length);
#endif
#ifdef G_OS_WIN32
- UnmapViewOfFile (file->contents);
- CloseHandle (file->mapping);
+ UnmapViewOfFile (file->contents);
+ CloseHandle (file->mapping);
#endif
- }
+ }
- g_free (file);
+ g_slice_free (GMappedFile, file);
+ }
}
-
#define __G_MAPPED_FILE_C__
#include "galiasdef.c"