Order function definitions in base/ according to the header.

base/shared_memory_posix.cc

 // Copyright (c) 2010 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/shared_memory.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
@@ skipping 178 matching lines @@
   if (!FilePathForMemoryName(name, &path))
     return false;
 
   read_only_ = read_only;
 
   const char *mode = read_only ? "r" : "r+";
   FILE *fp = file_util::OpenFile(path, mode);
   return PrepareMapFile(fp);
 }
 
-// For the given shmem named |mem_name|, return a filename to mmap()
-// (and possibly create).  Modifies |filename|.  Return false on
-// error, or true of we are happy.
-bool SharedMemory::FilePathForMemoryName(const std::string& mem_name,
-                                         FilePath* path) {
-  // mem_name will be used for a filename; make sure it doesn't
-  // contain anything which will confuse us.
-  DCHECK(mem_name.find('/') == std::string::npos);
-  DCHECK(mem_name.find('\0') == std::string::npos);
-
-  FilePath temp_dir;
-  if (!file_util::GetShmemTempDir(&temp_dir))
+bool SharedMemory::Map(uint32 bytes) {
+  if (mapped_file_ == -1)
     return false;
 
-  *path = temp_dir.AppendASCII("com.google.chrome.shmem." + mem_name);
+  memory_ = mmap(NULL, bytes, PROT_READ | (read_only_ ? 0 : PROT_WRITE),
+                 MAP_SHARED, mapped_file_, 0);
+
+  if (memory_)
+    mapped_size_ = bytes;
+
+  bool mmap_succeeded = (memory_ != (void*)-1);
+  DCHECK(mmap_succeeded) << "Call to mmap failed, errno=" << errno;
+  return mmap_succeeded;
+}
+
+bool SharedMemory::Unmap() {
+  if (memory_ == NULL)
+    return false;
+
+  munmap(memory_, mapped_size_);
+  memory_ = NULL;
+  mapped_size_ = 0;
   return true;
 }
 
+SharedMemoryHandle SharedMemory::handle() const {
+  return FileDescriptor(mapped_file_, false);
+}
+
+void SharedMemory::Close() {
+  Unmap();
+
+  if (mapped_file_ > 0) {
+    close(mapped_file_);
+    mapped_file_ = -1;
+  }
+}
+
+void SharedMemory::Lock() {
+  LockOrUnlockCommon(F_LOCK);
+}
+
+void SharedMemory::Unlock() {
+  LockOrUnlockCommon(F_ULOCK);
+}
+
 bool SharedMemory::PrepareMapFile(FILE *fp) {
   DCHECK(mapped_file_ == -1);
   if (fp == NULL) return false;
 
   // This function theoretically can block on the disk, but realistically
   // the temporary files we create will just go into the buffer cache
   // and be deleted before they ever make it out to disk.
   base::ThreadRestrictions::ScopedAllowIO allow_io;
 
   file_util::ScopedFILE file_closer(fp);
 
   mapped_file_ = dup(fileno(fp));
   if (mapped_file_ == -1) {
     if (errno == EMFILE) {
       LOG(WARNING) << "Shared memory creation failed; out of file descriptors";
       return false;
     } else {
       NOTREACHED() << "Call to dup failed, errno=" << errno;
     }
   }
 
   struct stat st;
   if (fstat(mapped_file_, &st))
     NOTREACHED();
   inode_ = st.st_ino;
 
   return true;
 }
 
-bool SharedMemory::Map(uint32 bytes) {
-  if (mapped_file_ == -1)
+// For the given shmem named |mem_name|, return a filename to mmap()
+// (and possibly create).  Modifies |filename|.  Return false on
+// error, or true of we are happy.
+bool SharedMemory::FilePathForMemoryName(const std::string& mem_name,
+                                         FilePath* path) {
+  // mem_name will be used for a filename; make sure it doesn't
+  // contain anything which will confuse us.
+  DCHECK(mem_name.find('/') == std::string::npos);
+  DCHECK(mem_name.find('\0') == std::string::npos);
+
+  FilePath temp_dir;
+  if (!file_util::GetShmemTempDir(&temp_dir))
     return false;
 
-  memory_ = mmap(NULL, bytes, PROT_READ | (read_only_ ? 0 : PROT_WRITE),
-                 MAP_SHARED, mapped_file_, 0);
-
-  if (memory_)
-    mapped_size_ = bytes;
-
-  bool mmap_succeeded = (memory_ != (void*)-1);
-  DCHECK(mmap_succeeded) << "Call to mmap failed, errno=" << errno;
-  return mmap_succeeded;
-}
-
-bool SharedMemory::Unmap() {
-  if (memory_ == NULL)
-    return false;
-
-  munmap(memory_, mapped_size_);
-  memory_ = NULL;
-  mapped_size_ = 0;
+  *path = temp_dir.AppendASCII("com.google.chrome.shmem." + mem_name);
   return true;
 }
 
-bool SharedMemory::ShareToProcessCommon(ProcessHandle process,
-                                        SharedMemoryHandle *new_handle,
-                                        bool close_self) {
-  const int new_fd = dup(mapped_file_);
-  DCHECK(new_fd >= 0);
-  new_handle->fd = new_fd;
-  new_handle->auto_close = true;
-
-  if (close_self)
-    Close();
-
-  return true;
-}
-
-
-void SharedMemory::Close() {
-  Unmap();
-
-  if (mapped_file_ > 0) {
-    close(mapped_file_);
-    mapped_file_ = -1;
-  }
-}
-
 void SharedMemory::LockOrUnlockCommon(int function) {
   DCHECK(mapped_file_ >= 0);
   while (lockf(mapped_file_, function, 0) < 0) {
     if (errno == EINTR) {
       continue;
     } else if (errno == ENOLCK) {
       // temporary kernel resource exaustion
       base::PlatformThread::Sleep(500);
       continue;
     } else {
       NOTREACHED() << "lockf() failed."
                    << " function:" << function
                    << " fd:" << mapped_file_
                    << " errno:" << errno
                    << " msg:" << safe_strerror(errno);
     }
   }
 }
 
-void SharedMemory::Lock() {
-  LockOrUnlockCommon(F_LOCK);
-}
+bool SharedMemory::ShareToProcessCommon(ProcessHandle process,
+                                        SharedMemoryHandle *new_handle,
+                                        bool close_self) {
+  const int new_fd = dup(mapped_file_);
+  DCHECK(new_fd >= 0);
+  new_handle->fd = new_fd;
+  new_handle->auto_close = true;
 
-void SharedMemory::Unlock() {
-  LockOrUnlockCommon(F_ULOCK);
-}
+  if (close_self)
+    Close();
 
-SharedMemoryHandle SharedMemory::handle() const {
-  return FileDescriptor(mapped_file_, false);
+  return true;
 }
 
 }  // namespace base