Some allocator cleanup in the new Table.

1 files changed, 34 insertions, 0 deletions

diff --git a/wintable/new/util.h b/wintable/new/util.h
index 2bcfd94..dc51605 100644
--- a/wintable/new/util.h
+++ b/wintable/new/util.h
@@ -12,3 +12,37 @@ static BOOL runHandlers(const handlerfunc list[], struct table *t, UINT uMsg, WP
 			return TRUE;
 	return FALSE;
 }
+
+// memory allocation stuff
+// each of these functions do an implicit ZeroMemory()
+// we're using LocalAlloc() because:
+// - whether the malloc() family supports the last-error code is undefined
+// - the HeapAlloc() family DOES NOT support the last-error code; you're supposed to use Windows exceptions, and I can't find a clean way to do this with MinGW-w64 that doesn't rely on inline assembly or external libraries (unless they added __try/__except blocks)
+// - there's no VirtualReAlloc() to complement VirtualAlloc() and I'm not sure if we can even get the original allocated size back out reliably to write it ourselves (http://blogs.msdn.com/b/oldnewthing/archive/2012/03/16/10283988.aspx)
+// needless to say, TODO
+
+static void *tableAlloc(size_t size, const char *panicMessage)
+{
+	HLOCAL out;
+
+	out = LocalAlloc(LMEM_FIXED | LMEM_ZEROINIT, size);
+	if (out == NULL)
+		panic(panicMessage);
+	return (void *) out;
+}
+
+static void *tableRealloc(void *p, size_t size, const char *panicMessage)
+{
+	HLOCAL out;
+
+	out = LocalReAlloc((HLOCAL) p, size, LMEM_ZEROINIT);
+	if (out == NULL)
+		panic(panicMessage);
+	return (void *) out;
+}
+
+static void tableFree(void *p, const char *panicMessage)
+{
+	if (LocalFree((HLOCAL) p) != NULL)
+		panic(panicMessage);
+}