Add mount sources for a MountNode (inode)

native_client_sdk/src/libraries/nacl_mounts/mount_node_dir.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 <dirent.h>
 #include <errno.h>
 #include <sys/stat.h>
 
+#include "macros.h"
 #include "auto_lock.h"
 #include "mount_node_dir.h"
 
-MountNodeDir::MountNodeDir(Mount* mount, int ino, int dev) :
-    MountNode(mount, ino, dev),
-    cache_(NULL) {
+MountNodeDir::MountNodeDir(Mount* mount, int ino, int dev)
+    : MountNode(mount, ino, dev),
+      cache_(NULL) {
 }
 
 MountNodeDir::~MountNodeDir() {
   free(cache_);
 }
 
 bool MountNodeDir::Init(int mode, short uid, short gid) {
   bool ok = MountNode::Init(mode, uid, gid);
   stat_.st_mode |= _S_IFDIR;
   return ok;
@@ skipping 41 matching lines @@
   return size;
 }
 
 int MountNodeDir:: AddChild(const std::string& name, MountNode* node) {
   AutoLock lock(&lock_);
 
   if (name.empty()) {
     errno = ENOENT;
     return -1;
   }
-
   if (name.length() >= MEMBER_SIZE(struct dirent, d_name)) {
     errno = ENAMETOOLONG;
     return -1;
   }
 
   MountNodeMap_t::iterator it = map_.find(name);
   if (it != map_.end()) {
     errno = EEXIST;
     return -1;
   }
@@ skipping 20 matching lines @@
 MountNode* MountNodeDir::FindChild(const std::string& name) {
   AutoLock lock(&lock_);
   MountNodeMap_t::iterator it = map_.find(name);
   if (it != map_.end()) {
     return it->second;
   }
   errno = ENOENT;
   return NULL;
 }
 
+int MountNodeDir::ChildCount() {
+  AutoLock lock(&lock_);
+  return map_.size();
+}
+
 void MountNodeDir::ClearCache() {
   free(cache_);
   cache_ = NULL;
 }
 
 void MountNodeDir::BuildCache() {
   if (map_.size()) {
     cache_ = (struct dirent *) malloc(sizeof(struct dirent) * map_.size());
     MountNodeMap_t::iterator it = map_.begin();
     for (size_t index = 0; it != map_.end(); it++, index++) {
       MountNode* node = it->second;
       size_t len = it->first.length();
       cache_[index].d_ino = node->stat_.st_ino;
       cache_[index].d_reclen = sizeof(struct dirent);
       cache_[index].d_name[len] = 0;
       strncpy(cache_[index].d_name, &it->first[0], len);
     }
   }
 }