1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "chrome/common/multi_process_lock.h" 6 7 #include "base/logging.h" 8 #include "base/mac/scoped_cftyperef.h" 9 #include "base/sys_string_conversions.h" 10 11 class MultiProcessLockMac : public MultiProcessLock { 12 public: MultiProcessLockMac(const std::string & name)13 explicit MultiProcessLockMac(const std::string& name) : name_(name) { } 14 ~MultiProcessLockMac()15 virtual ~MultiProcessLockMac() { 16 if (port_ != NULL) { 17 Unlock(); 18 } 19 } 20 TryLock()21 virtual bool TryLock() { 22 if (port_ != NULL) { 23 DLOG(ERROR) << "MultiProcessLock is already locked - " << name_; 24 return true; 25 } 26 27 if (name_.length() > MULTI_PROCESS_LOCK_NAME_MAX_LEN) { 28 LOG(ERROR) << "Socket name too long (" << name_.length() 29 << " > " << MULTI_PROCESS_LOCK_NAME_MAX_LEN << ") - " << name_; 30 return false; 31 } 32 33 CFStringRef cf_name(base::SysUTF8ToCFStringRef(name_)); 34 base::mac::ScopedCFTypeRef<CFStringRef> scoped_cf_name(cf_name); 35 port_.reset(CFMessagePortCreateLocal(NULL, cf_name, NULL, NULL, NULL)); 36 return port_ != NULL; 37 } 38 Unlock()39 virtual void Unlock() { 40 if (port_ == NULL) { 41 DLOG(ERROR) << "Over-unlocked MultiProcessLock - " << name_; 42 return; 43 } 44 port_.reset(); 45 } 46 47 private: 48 std::string name_; 49 base::mac::ScopedCFTypeRef<CFMessagePortRef> port_; 50 DISALLOW_COPY_AND_ASSIGN(MultiProcessLockMac); 51 }; 52 Create(const std::string & name)53MultiProcessLock* MultiProcessLock::Create(const std::string &name) { 54 return new MultiProcessLockMac(name); 55 } 56