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Unified Diff: third_party/lua/src/lmem.h

Issue 14907017: add SkLuaCanvas (Closed) Base URL: https://skia.googlecode.com/svn/trunk
Patch Set: Created 7 years, 7 months ago
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Index: third_party/lua/src/lmem.h
diff --git a/third_party/lua/src/lmem.h b/third_party/lua/src/lmem.h
new file mode 100644
index 0000000000000000000000000000000000000000..5f850999a9d6b079acec21682ffefb258b80b98f
--- /dev/null
+++ b/third_party/lua/src/lmem.h
@@ -0,0 +1,57 @@
+/*
+** $Id: lmem.h,v 1.40 2013/02/20 14:08:21 roberto Exp $
+** Interface to Memory Manager
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lmem_h
+#define lmem_h
+
+
+#include <stddef.h>
+
+#include "llimits.h"
+#include "lua.h"
+
+
+/*
+** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is
+** always constant.
+** The macro is somewhat complex to avoid warnings:
+** +1 avoids warnings of "comparison has constant result";
+** cast to 'void' avoids warnings of "value unused".
+*/
+#define luaM_reallocv(L,b,on,n,e) \
+ (cast(void, \
+ (cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 0), \
+ luaM_realloc_(L, (b), (on)*(e), (n)*(e)))
+
+#define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0)
+#define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0)
+#define luaM_freearray(L, b, n) luaM_reallocv(L, (b), n, 0, sizeof((b)[0]))
+
+#define luaM_malloc(L,s) luaM_realloc_(L, NULL, 0, (s))
+#define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t)))
+#define luaM_newvector(L,n,t) \
+ cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))
+
+#define luaM_newobject(L,tag,s) luaM_realloc_(L, NULL, tag, (s))
+
+#define luaM_growvector(L,v,nelems,size,t,limit,e) \
+ if ((nelems)+1 > (size)) \
+ ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))
+
+#define luaM_reallocvector(L, v,oldn,n,t) \
+ ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))
+
+LUAI_FUNC l_noret luaM_toobig (lua_State *L);
+
+/* not to be called directly */
+LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
+ size_t size);
+LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,
+ size_t size_elem, int limit,
+ const char *what);
+
+#endif
+
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