commit 9e53401c588f173595ba6f2727d64b32d1aaf525
author Iliyan Malchev <malchev@google.com> Thu Oct 29 22:55:00 2009 -0700
committer Iliyan Malchev <malchev@google.com> Fri Oct 30 18:35:47 2009 -0700
tree edb1f3fad8f2dd5e69fa92ec18176dfa08c9bd0a
parent b69dbf25b84a6485625321bdd970ff866407a7f3

libbinder: add a NO_CACHING flag to MemoryHeapBase

The NO_CACHING flag translates to opening a memory region with O_SYNC.

Signed-off-by: Iliyan Malchev <malchev@google.com>

MemoryHeapBase.cpp

diff --git a/MemoryHeapBase.cpp b/MemoryHeapBase.cpp
index 5df078f..624f7eb 100644
--- a/MemoryHeapBase.cpp
+++ b/MemoryHeapBase.cpp
@@ -67,7 +67,11 @@
     : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags),
       mDevice(0), mNeedUnmap(false)
 {
-    int fd = open(device, O_RDWR);
+    int open_flags = O_RDWR;
+    if (flags & NO_CACHING)
+        open_flags |= O_SYNC;
+
+    int fd = open(device, open_flags);
     LOGE_IF(fd<0, "error opening %s: %s", device, strerror(errno));
     if (fd >= 0) {
         const size_t pagesize = getpagesize();

include/hwbinder/MemoryHeapBase.h

diff --git a/include/hwbinder/MemoryHeapBase.h b/include/hwbinder/MemoryHeapBase.h
index 435540e..d793c24 100644
--- a/include/hwbinder/MemoryHeapBase.h
+++ b/include/hwbinder/MemoryHeapBase.h
@@ -35,7 +35,8 @@
         MAP_ONCE = IMemoryHeap::MAP_ONCE,
         // memory won't be mapped locally, but will be mapped in the remote
         // process.
-        DONT_MAP_LOCALLY = 0x00000100
+        DONT_MAP_LOCALLY = 0x00000100,
+        NO_CACHING = 0x00000200
     };
 
     /*