Revert of Revert of Make SharedMemoryHandle a class on Mac.

base/memory/shared_memory_posix.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/memory/shared_memory.h"
 
 #include <fcntl.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <unistd.h>
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/posix/safe_strerror.h"
 #include "base/process/process_metrics.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/scoped_generic.h"
 #include "base/strings/utf_string_conversions.h"
 
-#if defined(OS_MACOSX)
-#include "base/mac/foundation_util.h"
-#endif  // OS_MACOSX
-
 #if defined(OS_ANDROID)
 #include "base/os_compat_android.h"
 #include "third_party/ashmem/ashmem.h"
 #endif
 
 namespace base {
 
 namespace {
 
 struct ScopedPathUnlinkerTraits {
@@ skipping 67 matching lines @@
 
 SharedMemory::SharedMemory()
     : mapped_file_(-1),
       readonly_mapped_file_(-1),
       mapped_size_(0),
       memory_(NULL),
       read_only_(false),
       requested_size_(0) {
 }
 
-SharedMemory::SharedMemory(SharedMemoryHandle handle, bool read_only)
+SharedMemory::SharedMemory(const SharedMemoryHandle& handle, bool read_only)
     : mapped_file_(handle.fd),
       readonly_mapped_file_(-1),
       mapped_size_(0),
       memory_(NULL),
       read_only_(read_only),
       requested_size_(0) {
 }
 
-SharedMemory::SharedMemory(SharedMemoryHandle handle, bool read_only,
+SharedMemory::SharedMemory(const SharedMemoryHandle& handle,
+                           bool read_only,
                            ProcessHandle process)
     : mapped_file_(handle.fd),
       readonly_mapped_file_(-1),
       mapped_size_(0),
       memory_(NULL),
       read_only_(read_only),
       requested_size_(0) {
   // We don't handle this case yet (note the ignored parameter); let's die if
   // someone comes calling.
   NOTREACHED();
@@ skipping 150 matching lines @@
     if (fstat(fileno(fp.get()), &stat) != 0)
       return false;
     const size_t current_size = stat.st_size;
     if (current_size != options.size) {
       if (HANDLE_EINTR(ftruncate(fileno(fp.get()), options.size)) != 0)
         return false;
     }
     requested_size_ = options.size;
   }
   if (fp == NULL) {
-#if !defined(OS_MACOSX)
     PLOG(ERROR) << "Creating shared memory in " << path.value() << " failed";
     FilePath dir = path.DirName();
     if (access(dir.value().c_str(), W_OK | X_OK) < 0) {
       PLOG(ERROR) << "Unable to access(W_OK|X_OK) " << dir.value();
       if (dir.value() == "/dev/shm") {
         LOG(FATAL) << "This is frequently caused by incorrect permissions on "
                    << "/dev/shm.  Try 'sudo chmod 1777 /dev/shm' to fix.";
       }
     }
-#else
-    PLOG(ERROR) << "Creating shared memory in " << path.value() << " failed";
-#endif
     return false;
   }
 
   return PrepareMapFile(fp.Pass(), readonly_fd.Pass());
 }
 
 // Our current implementation of shmem is with mmap()ing of files.
 // These files need to be deleted explicitly.
 // In practice this call is only needed for unit tests.
 bool SharedMemory::Delete(const std::string& name) {
@@ skipping 136 matching lines @@
                                          FilePath* path) {
   // mem_name will be used for a filename; make sure it doesn't
   // contain anything which will confuse us.
   DCHECK_EQ(std::string::npos, mem_name.find('/'));
   DCHECK_EQ(std::string::npos, mem_name.find('\0'));
 
   FilePath temp_dir;
   if (!GetShmemTempDir(false, &temp_dir))
     return false;
 
-#if !defined(OS_MACOSX)
 #if defined(GOOGLE_CHROME_BUILD)
   std::string name_base = std::string("com.google.Chrome");
 #else
   std::string name_base = std::string("org.chromium.Chromium");
 #endif
-#else  // OS_MACOSX
-  std::string name_base = std::string(base::mac::BaseBundleID());
-#endif  // OS_MACOSX
   *path = temp_dir.AppendASCII(name_base + ".shmem." + mem_name);
   return true;
 }
 #endif  // !defined(OS_ANDROID)
 
 bool SharedMemory::ShareToProcessCommon(ProcessHandle process,
                                         SharedMemoryHandle* new_handle,
                                         bool close_self,
                                         ShareMode share_mode) {
   int handle_to_dup = -1;
@@ skipping 20 matching lines @@
 
   if (close_self) {
     Unmap();
     Close();
   }
 
   return true;
 }
 
 }  // namespace base