consistently use @synchronize decorator throughout

git-svn-id: http://pyfilesystem.googlecode.com/svn/trunk@182 67cdc799-7952-0410-af00-57a81ceafa0f

2 files changed, 140 insertions, 210 deletions

diff --git a/fs/multifs.py b/fs/multifs.py
index 3454e64..8163300 100644
--- a/fs/multifs.py
+++ b/fs/multifs.py
@@ -19,12 +19,9 @@ class MultiFS(FS):
         self.fs_sequence = []
         self.fs_lookup =  {}
 
+    @synchronize
     def __str__(self):
-        self._lock.acquire()
-        try:
-            return "<MultiFS: %s>" % ", ".join(str(fs) for fs in self.fs_sequence)
-        finally:
-            self._lock.release()
+        return "<MultiFS: %s>" % ", ".join(str(fs) for fs in self.fs_sequence)
 
     __repr__ = __str__
 
@@ -32,6 +29,7 @@ class MultiFS(FS):
         return unicode(self.__str__())
 
 
+    @synchronize
     def addfs(self, name, fs):
         """Adds a filesystem to the MultiFS.
 
@@ -39,46 +37,32 @@ class MultiFS(FS):
         fs -- The filesystem to add
 
         """
-        self._lock.acquire()
-        try:
-            if name in self.fs_lookup:
-                raise ValueError("Name already exists.")
+        if name in self.fs_lookup:
+            raise ValueError("Name already exists.")
 
-            self.fs_sequence.append(fs)
-            self.fs_lookup[name] = fs
-        finally:
-            self._lock.release()
+        self.fs_sequence.append(fs)
+        self.fs_lookup[name] = fs
 
+    @synchronize
     def removefs(self, name):
         """Removes a filesystem from the sequence.
 
         name -- The name of the filesystem, as used in addfs
 
         """
-        self._lock.acquire()
-        try:
-            if name not in self.fs_lookup:
-                raise ValueError("No filesystem called '%s'"%name)
-            fs = self.fs_lookup[name]
-            self.fs_sequence.remove(fs)
-            del self.fs_lookup[name]
-        finally:
-            self._lock.release()
+        if name not in self.fs_lookup:
+            raise ValueError("No filesystem called '%s'"%name)
+        fs = self.fs_lookup[name]
+        self.fs_sequence.remove(fs)
+        del self.fs_lookup[name]
 
+    @synchronize
     def __getitem__(self, name):
-        self._lock.acquire()
-        try:
-            return self.fs_lookup[name]
-        finally:
-            self._lock.release()
+        return self.fs_lookup[name]
 
+    @synchronize
     def __iter__(self):
-        self._lock.acquire()
-        try:
-            return iter(self.fs_sequence[:])
-        finally:
-            self._lock.release()
-
+        return iter(self.fs_sequence[:])
 
     def _delegate_search(self, path):
         for fs in self:
@@ -86,6 +70,7 @@ class MultiFS(FS):
                 return fs
         return None
 
+    @synchronize
     def which(self, path):
         """Retrieves the filesystem that a given path would delegate to.
         Returns a tuple of the filesystem's name and the filesystem object itself.
@@ -93,137 +78,98 @@ class MultiFS(FS):
         path -- A path in MultiFS
 
         """
-        self._lock.acquire()
-        try:
-            for fs in self:
-                if fs.exists(path):
-                    for fs_name, fs_object in self.fs_lookup.iteritems():
-                        if fs is fs_object:
-                            return fs_name, fs
-            raise ResourceNotFoundError(path, msg="Path does not map to any filesystem: %(path)s")
-        finally:
-            self._lock.release()
+        for fs in self:
+            if fs.exists(path):
+                for fs_name, fs_object in self.fs_lookup.iteritems():
+                    if fs is fs_object:
+                        return fs_name, fs
+        raise ResourceNotFoundError(path, msg="Path does not map to any filesystem: %(path)s")
 
+    @synchronize
     def getsyspath(self, path, allow_none=False):
-        self._lock.acquire()
-        try:
-            fs = self._delegate_search(path)
-            if fs is not None:
-                return fs.getsyspath(path, allow_none=allow_none)
-            raise ResourceNotFoundError(path)
-        finally:
-            self._lock.release()
+        fs = self._delegate_search(path)
+        if fs is not None:
+            return fs.getsyspath(path, allow_none=allow_none)
+        raise ResourceNotFoundError(path)
 
+    @synchronize
     def desc(self, path):
-        self._lock.acquire()
-        try:
-            if not self.exists(path):
-                raise ResourceNotFoundError(path)
-
-            name, fs = self.which(path)
-            if name is None:
-                return ""
-            return "%s, on %s (%s)" % (fs.desc(path), name, fs)
-        finally:
-            self._lock.release()
+        if not self.exists(path):
+            raise ResourceNotFoundError(path)
 
+        name, fs = self.which(path)
+        if name is None:
+            return ""
+        return "%s, on %s (%s)" % (fs.desc(path), name, fs)
 
+    @synchronize
     def open(self, path, mode="r",**kwargs):
-        self._lock.acquire()
-        try:
-            for fs in self:
-                if fs.exists(path):
-                    fs_file = fs.open(path, mode, **kwargs)
-                    return fs_file
+        for fs in self:
+            if fs.exists(path):
+                fs_file = fs.open(path, mode, **kwargs)
+                return fs_file
 
-            raise ResourceNotFoundError(path)
-        finally:
-            self._lock.release()
+        raise ResourceNotFoundError(path)
 
+    @synchronize
     def exists(self, path):
-        self._lock.acquire()
-        try:
-            return self._delegate_search(path) is not None
-        finally:
-            self._lock.release()
+        return self._delegate_search(path) is not None
 
+    @synchronize
     def isdir(self, path):
-        self._lock.acquire()
-        try:
-            fs = self._delegate_search(path)
-            if fs is not None:
-                return fs.isdir(path)
-            return False
-        finally:
-            self._lock.release()
+        fs = self._delegate_search(path)
+        if fs is not None:
+            return fs.isdir(path)
+        return False
 
+    @synchronize
     def isfile(self, path):
-        self._lock.acquire()
-        try:
-            fs = self._delegate_search(path)
-            if fs is not None:
-                return fs.isfile(path)
-            return False
-        finally:
-            self._lock.release()
+        fs = self._delegate_search(path)
+        if fs is not None:
+            return fs.isfile(path)
+        return False
 
+    @synchronize
     def listdir(self, path="./", *args, **kwargs):
-        self._lock.acquire()
-        try:
-            paths = []
-            for fs in self:
-                try:
-                    paths += fs.listdir(path, *args, **kwargs)
-                except FSError, e:
-                    pass
-
-            return list(set(paths))
-        finally:
-            self._lock.release()
+        paths = []
+        for fs in self:
+            try:
+                paths += fs.listdir(path, *args, **kwargs)
+            except FSError, e:
+                pass
+
+        return list(set(paths))
 
+    @synchronize
     def remove(self, path):
-        self._lock.acquire()
-        try:
-            for fs in self:
-                if fs.exists(path):
-                    fs.remove(path)
-                    return
-            raise ResourceNotFoundError(path)
-        finally:
-            self._lock.release()
+        for fs in self:
+            if fs.exists(path):
+                fs.remove(path)
+                return
+        raise ResourceNotFoundError(path)
 
+    @synchronize
     def removedir(self, path, recursive=False):
-        self._lock.acquire()
-        try:
-            for fs in self:
-                if fs.isdir(path):
-                    fs.removedir(path, recursive)
-                    return
-            raise ResourceNotFoundError(path)
-        finally:
-            self._lock.release()
+        for fs in self:
+            if fs.isdir(path):
+                fs.removedir(path, recursive)
+                return
+        raise ResourceNotFoundError(path)
 
+    @synchronize
     def rename(self, src, dst):
         if not issamedir(src, dst):
             raise ValueError("Destination path must the same directory (use the move method for moving to a different directory)")
-        self._lock.acquire()
-        try:
-            for fs in self:
-                if fs.exists(src):
-                    fs.rename(src, dst)
-                    return
-            raise ResourceNotFoundError(path)
-        finally:
-            self._lock.release()
+        for fs in self:
+            if fs.exists(src):
+                fs.rename(src, dst)
+                return
+        raise ResourceNotFoundError(path)
 
+    @synchronize
     def getinfo(self, path):
-        self._lock.acquire()
-        try:
-            for fs in self:
-                if fs.exists(path):
-                    return fs.getinfo(path)
-
-            raise ResourceNotFoundError(path)
-        finally:
-            self._lock.release()
+        for fs in self:
+            if fs.exists(path):
+                return fs.getinfo(path)
+        raise ResourceNotFoundError(path)
 
diff --git a/fs/zipfs.py b/fs/zipfs.py
index 2d1bdec..c6470b1 100644
--- a/fs/zipfs.py
+++ b/fs/zipfs.py
@@ -119,59 +119,49 @@ class ZipFS(FS):
     def __del__(self):
         self.close()
 
+    @synchronize
     def open(self, path, mode="r", **kwargs):
+        path = normpath(path)
+        self.zip_path = path
 
-        self._lock.acquire()
-        try:
-            path = normpath(path)
-            self.zip_path = path
-
-            if 'r' in mode:
-                if self.zip_mode not in 'ra':
-                    raise OperationFailedError("open file", path=path, msg="Zip file must be opened for reading ('r') or appending ('a')")
-                try:
-                    contents = self.zf.read(path)
-                except KeyError:
-                    raise ResourceNotFoundError(path)
-                return StringIO(contents)
+        if 'r' in mode:
+            if self.zip_mode not in 'ra':
+                raise OperationFailedError("open file", path=path, msg="Zip file must be opened for reading ('r') or appending ('a')")
+            try:
+                contents = self.zf.read(path)
+            except KeyError:
+                raise ResourceNotFoundError(path)
+            return StringIO(contents)
 
-            if 'w' in mode:
-                dirname, filename = pathsplit(path)
-                if dirname:
-                    self.temp_fs.makedir(dirname, recursive=True, allow_recreate=True)
+        if 'w' in mode:
+            dirname, filename = pathsplit(path)
+            if dirname:
+                self.temp_fs.makedir(dirname, recursive=True, allow_recreate=True)
 
-                self._add_resource(path)
-                f = _TempWriteFile(self.temp_fs, path, self._on_write_close)
+            self._add_resource(path)
+            f = _TempWriteFile(self.temp_fs, path, self._on_write_close)
 
-                return f
+            return f
 
-            raise ValueError("Mode must contain be 'r' or 'w'")
-        finally:
-            self._lock.release()
+        raise ValueError("Mode must contain be 'r' or 'w'")
 
+    @synchronize
     def getcontents(self, path):
-        self._lock.acquire()
+        if not self.exists(path):
+            raise ResourceNotFoundError(path)
+        path = normpath(path)
         try:
-            if not self.exists(path):
-                raise ResourceNotFoundError(path)
-            path = normpath(path)
-            try:
-                contents = self.zf.read(path)
-            except KeyError:
-                raise ResourceNotFoundError(path)
-            except RuntimeError:
-                raise OperationFailedError("read file", path=path, msg="Zip file must be oppened with 'r' or 'a' to read")
-            return contents
-        finally:
-            self._lock.release()
-
+            contents = self.zf.read(path)
+        except KeyError:
+            raise ResourceNotFoundError(path)
+        except RuntimeError:
+            raise OperationFailedError("read file", path=path, msg="Zip file must be oppened with 'r' or 'a' to read")
+        return contents
+
+    @synchronize
     def _on_write_close(self, filename):
-        self._lock.acquire()
-        try:
-            sys_path = self.temp_fs.getsyspath(filename)
-            self.zf.write(sys_path, filename)
-        finally:
-            self._lock.release()
+        sys_path = self.temp_fs.getsyspath(filename)
+        self.zf.write(sys_path, filename)
 
     def desc(self, path):
         if self.isdir(path):
@@ -188,40 +178,34 @@ class ZipFS(FS):
     def exists(self, path):
         return self._path_fs.exists(path)
 
-    def makedir(self, dirname, mode=0777, recursive=False, allow_recreate=False):
-        self._lock.acquire()
-        try:
-            dirname = normpath(dirname)
-            if self.zip_mode not in "wa":
-                raise OperationFailedError("create directory", path=dirname, msg="Zip file must be opened for writing ('w') or appending ('a')")
-            if not dirname.endswith('/'):
-                dirname += '/'
-            self._add_resource(dirname)
-        finally:
-            self._lock.release()
+    @synchronize
+    def makedir(self, dirname, recursive=False, allow_recreate=False):
+        dirname = normpath(dirname)
+        if self.zip_mode not in "wa":
+            raise OperationFailedError("create directory", path=dirname, msg="Zip file must be opened for writing ('w') or appending ('a')")
+        if not dirname.endswith('/'):
+            dirname += '/'
+        self._add_resource(dirname)
 
     def listdir(self, path="/", wildcard=None, full=False, absolute=False, dirs_only=False, files_only=False):
 
         return self._path_fs.listdir(path, wildcard, full, absolute, dirs_only, files_only)
 
 
+    @synchronize
     def getinfo(self, path):
-        self._lock.acquire()
+        if not self.exists(path):
+            return ResourceNotFoundError(path)
+        path = normpath(path).lstrip('/')
         try:
-            if not self.exists(path):
-                return ResourceNotFoundError(path)
-            path = normpath(path).lstrip('/')
-            try:
-                zi = self.zf.getinfo(path)
-                zinfo = dict((attrib, getattr(zi, attrib)) for attrib in dir(zi) if not attrib.startswith('_'))
-            except KeyError:
-                zinfo = {'file_size':0}
-            info = {'size' : zinfo['file_size'] }
-            if 'date_time' in zinfo:
-                info['created_time'] = datetime.datetime(*zinfo['date_time'])
-            info.update(zinfo)
-            return info
-        finally:
-            self._lock.release()
+            zi = self.zf.getinfo(path)
+            zinfo = dict((attrib, getattr(zi, attrib)) for attrib in dir(zi) if not attrib.startswith('_'))
+        except KeyError:
+            zinfo = {'file_size':0}
+        info = {'size' : zinfo['file_size'] }
+        if 'date_time' in zinfo:
+            info['created_time'] = datetime.datetime(*zinfo['date_time'])
+        info.update(zinfo)
+        return info