Implementation of an STL compatible allocator for Courgette on Windows.

This is to better handle low memory situations when applying a differential
patch to a large Chrome setup.

For reading input files, I'm also switching to using memory mapped files
instead of ReadFileToString to reduce the load on the heap.

TEST=courgette.exe should succeed in applying a patch between two
  chrome 10.x archives on an XP machine with 180MB of physical memory and
  no page file.
BUG=72459,73209

Review URL: http://codereview.chromium.org/6597038

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@76320 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 6 insertions, 1 deletions

diff --git a/courgette/streams.h b/courgette/streams.h
index 3dbc2b7..7be28a5 100644
--- a/courgette/streams.h
+++ b/courgette/streams.h
@@ -18,6 +18,7 @@
 
 #include "base/basictypes.h"
 
+#include "courgette/memory_allocator.h"
 #include "courgette/region.h"
 
 namespace courgette {
@@ -151,7 +152,11 @@ class SinkStream {
   void Retire();
 
  private:
-  std::string buffer_;  // Use a string to manage the stream's memory.
+  // Use a string to manage the stream's memory.
+  typedef std::basic_string<char,
+                            std::char_traits<char>,
+                            MemoryAllocator<char> > SinkBuffer;
+  SinkBuffer buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(SinkStream);
 };