Public Member Functions
	Mutex (const Mutex &)=delete

	Mutex (Mutex &&)=delete

Mutex &	operator= (const Mutex &)=delete

Mutex &	operator= (Mutex &&)=delete

void	lock ()

void	unlock ()

bool	try_lock ()

template<typename Rep , typename Period >
bool	try_lock_for (const std::chrono::duration< Rep, Period > &)

template<typename Clock , typename Duration >
bool	try_lock_until (const std::chrono::time_point< Clock, Duration > &)

bool	try_lock_until (Deadline deadline)

Detailed Description

std::mutex replacement for asynchronous tasks

Example usage:

  engine::Mutex mutex;
  constexpr std::string_view kTestData = "Test Data";
 
  {
    std::lock_guard<engine::Mutex> lock(mutex);
    // accessing data under a mutex
    const auto x = kTestData;
    ASSERT_EQ(kTestData, x);
  }

See also: Synchronization Primitives

Definition at line 26 of file mutex.hpp.

Member Function Documentation

◆ lock()

void engine::Mutex::lock ( )

Locks the mutex. Blocks current coroutine if the mutex is locked by another coroutine.

Note: the behaviour is undefined if a coroutine tries to lock a mutex which is already locked by the current coroutine.; the method waits for the mutex even if the current task is cancelled.

◆ try_lock_for()

template<typename Rep , typename Period >

bool engine::Mutex::try_lock_for ( const std::chrono::duration< Rep, Period > & duration )

Definition at line 68 of file mutex.hpp.

◆ try_lock_until()

template<typename Clock , typename Duration >

bool engine::Mutex::try_lock_until ( const std::chrono::time_point< Clock, Duration > & until )

Definition at line 73 of file mutex.hpp.

◆ unlock()

void engine::Mutex::unlock ( )

Unlocks the mutex. The mutex must be locked by the current coroutine.

Note: the behaviour is undefined if a coroutine tries to unlock a mutex which is not locked or is locked by another coroutine; the order of coroutines to unblock is unspecified. Any code assuming any specific order (e.g. FIFO) is incorrect and must be fixed.

The documentation for this class was generated from the following file:

userver/engine/mutex.hpp

Table of Contents

Public Member Functions