二进制信号量和互斥量的区别

先决条件 – 进程同步

1. 二进制信号量：
二进制信号量是只能假定值 0 和 1 的信号量。它们用于通过使用信号机制实现互斥来实现锁。

这里，如果 semaphore 的值为 0 表示它被锁定，因此锁定不可用。
如果 semaphore 的值为 1，则表示它已解锁，因此锁定可用。

2.互斥：
互斥锁提供互斥，生产者或消费者都可以拥有密钥(互斥锁)并继续他们的工作。只要缓冲区被生产者填满，消费者就需要等待，反之亦然。

在任何时候，只有一个线程可以处理整个缓冲区。这个概念可以使用信号量来概括。

二元信号量和互斥量的区别：

Binary Semaphore	Mutex
Its functions based up on signalling mechanism	Its functions based up on locking mechanism
The thread which is having higher priority than current thread can also release binary semaphore and take lock.	The thread which has acquired mutex can only release Mutex when it exits from critical section.
Semaphore value is changed according to wait () and signal () operations.	Mutex values can be modified just as locked or unlocked.
Multiple number of threads can acquire binary semaphore at a time concurrently.	Only one thread can acquire mutex at a time
Binary semaphore have no ownership.	There is ownership associated with mutex because only owner can release the lock.
They are faster than mutex because any other thread/process can unlock binary semaphore.	They are slower than binary semaphores because only thread which has acquired must release the lock.
If you have number of instances for resource it is better to use Binary semaphore.	If you have single instance for resource it is better to use mutex.