From 9a55db7b612ceaa09a44b63ff0703af0ebe34cf0 Mon Sep 17 00:00:00 2001
From: Ehsan Akhgari <ehsan@mozilla.com>
Date: Fri, 4 Jan 2013 13:57:27 -0500
Subject: [PATCH] Bug 826779 - Get DMD to build on Windows; r=bbondy

---
 memory/replace/dmd/DMD.cpp     | 26 ++++++++++++++++++--------
 memory/replace/dmd/Makefile.in |  4 ++++
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/memory/replace/dmd/DMD.cpp b/memory/replace/dmd/DMD.cpp
index 24342660033e..e6059182dca0 100644
--- a/memory/replace/dmd/DMD.cpp
+++ b/memory/replace/dmd/DMD.cpp
@@ -15,10 +15,8 @@
 #include <string.h>
 
 #ifdef XP_WIN
-#error "Windows not supported yet, sorry."
-// XXX: This will be needed when Windows is supported (bug 819839).
-//#include <process.h>
-//#define getpid _getpid
+#include <windows.h>
+#include <process.h>
 #else
 #include <unistd.h>
 #endif
@@ -42,7 +40,21 @@
 // PAGE_SIZE.  Nb: sysconf() is expensive, but it's only used for (the obsolete
 // and rarely used) valloc.
 #define MOZ_REPLACE_ONLY_MEMALIGN 1
+#ifdef XP_WIN
+#define PAGE_SIZE GetPageSize()
+static long GetPageSize()
+{
+  SYSTEM_INFO si;
+  GetSystemInfo(&si);
+  return si.dwPageSize;
+}
+static void* valloc(size_t size)
+{
+  return VirtualAlloc(NULL, size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
+}
+#else
 #define PAGE_SIZE sysconf(_SC_PAGESIZE)
+#endif
 #include "replace_malloc.h"
 #undef MOZ_REPLACE_ONLY_MEMALIGN
 #undef PAGE_SIZE
@@ -275,8 +287,6 @@ static const size_t kNoSize = size_t(-1);
 // MutexBase implements the platform-specific parts of a mutex.
 #ifdef XP_WIN
 
-#include <windows.h>
-
 class MutexBase
 {
   CRITICAL_SECTION mCS;
@@ -407,9 +417,9 @@ public:
 #ifdef XP_WIN
 
 #define DMD_TLS_INDEX_TYPE              DWORD
-#define DMD_CREATE_TLS_INDEX(i_)        PR_BEGIN_MACRO                        \
+#define DMD_CREATE_TLS_INDEX(i_)        do {                                  \
                                           (i_) = TlsAlloc();                  \
-                                        PR_END_MACRO
+                                        } while (0)
 #define DMD_DESTROY_TLS_INDEX(i_)       TlsFree((i_))
 #define DMD_GET_TLS_DATA(i_)            TlsGetValue((i_))
 #define DMD_SET_TLS_DATA(i_, v_)        TlsSetValue((i_), (v_))
diff --git a/memory/replace/dmd/Makefile.in b/memory/replace/dmd/Makefile.in
index 9d1424f0336a..bfa5f7eafbcd 100644
--- a/memory/replace/dmd/Makefile.in
+++ b/memory/replace/dmd/Makefile.in
@@ -35,5 +35,9 @@ MOZ_GLUE_LDFLAGS=
 
 STL_FLAGS 	=
 
+ifeq ($(OS_ARCH),WINNT)
+OS_LIBS         += $(call EXPAND_LIBNAME,dbghelp)
+endif
+
 include $(topsrcdir)/config/config.mk
 include $(topsrcdir)/config/rules.mk