1 files changed, 70 insertions, 0 deletions
diff --git a/xpcom/typelib/xpt/xpt_arena.h b/xpcom/typelib/xpt/xpt_arena.h
new file mode 100644
index 000000000..6ac146ffe
--- /dev/null
+++ b/xpcom/typelib/xpt/xpt_arena.h
@@ -0,0 +1,70 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Simple arena allocator for xpt (which avoids using NSPR).
+ */
+
+#ifndef __xpt_arena_h__
+#define __xpt_arena_h__
+
+#include <stdlib.h>
+#include "mozilla/Attributes.h"
+#include "mozilla/MemoryReporting.h"
+#include <stdint.h>
+
+
+/*
+ * The XPT library is statically linked: no functions are exported from
+ * shared libraries.
+ */
+#define XPT_PUBLIC_API(t)    t
+#define XPT_PUBLIC_DATA(t)   t
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Simple Arena support. Use with caution!
+ */ 
+
+typedef struct XPTArena XPTArena;
+
+XPT_PUBLIC_API(XPTArena *)
+XPT_NewArena(size_t block_size8, size_t block_size1);
+
+XPT_PUBLIC_API(void)
+XPT_DestroyArena(XPTArena *arena);
+
+XPT_PUBLIC_API(void *)
+XPT_ArenaCalloc(XPTArena *arena, size_t size, size_t alignment);
+
+XPT_PUBLIC_API(size_t)
+XPT_SizeOfArenaIncludingThis(XPTArena *arena, MozMallocSizeOf mallocSizeOf);
+
+/* --------------------------------------------------------- */
+
+#define XPT_CALLOC8(_arena, _bytes) XPT_ArenaCalloc((_arena), (_bytes), 8)
+#define XPT_CALLOC1(_arena, _bytes) XPT_ArenaCalloc((_arena), (_bytes), 1)
+#define XPT_NEWZAP(_arena, _struct) ((_struct *) XPT_CALLOC8((_arena), sizeof(_struct)))
+
+/* --------------------------------------------------------- */
+
+#ifdef DEBUG
+XPT_PUBLIC_API(void)
+XPT_AssertFailed(const char *s, const char *file, uint32_t lineno)
+  MOZ_PRETEND_NORETURN_FOR_STATIC_ANALYSIS;
+#define XPT_ASSERT(_expr) \
+    ((_expr)?((void)0):XPT_AssertFailed(# _expr, __FILE__, __LINE__))
+#else
+#define XPT_ASSERT(_expr) ((void)0)
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __xpt_arena_h__ */