what is difference between mutual exclusion and mutex?
603646
Mutual Exclusion Object is shortly termed as Mutex. From the term mutual exclusion, we can understand that only one process at a time can access the given resource. The mutex object allows the multiple program threads to use the same resource but one at a time not simultaneously.
270333
Deadlock in OS is a situation where two or more processes are blocked. Conditions for Deadlock- Mutual Exclusion, Hold and Wait, No preemption, Circular wait. These 4 conditions must hold simultaneously for the occurrence of deadlock.
327213
The binary semaphores are quite similar to counting semaphores, but their value is restricted to 0 and 1. ... Counting Semaphore has no mutual exclusion whereas Binary Semaphore has Mutual exclusion. Semaphore means a signaling mechanism whereas Mutex is a locking mechanism.
184613
System V IPC is older and POSIX IPC is newer. However there are some differences for some aspects. Not always Posix is better than System V. The semaphores, queues and shared memory for Posix have Ascii string names, while under System V these are given with integer number.
1356038
FIFO can be either synchronous or asynchronous. The basic difference between them is that the entire operation of synchronous FIFO is entirely dependent on the clock where as the write operation and read operation of asynchronous FIFO are asynchronous to each other.
36478
Key Differences Between Stack and Queue. Stack follows LIFO mechanism on the other hand Queue follows FIFO mechanism to add and remove elements. In a stack, the same end is used to insert and delete the elements. On the contrary, two different ends are used in the queue to insert and delete the elements.
576642
In most systems, boolean semaphores are just a special case of counting semaphores, also known as general semaphores. The condition variable is a synchronization primative that provides a queue for threads waiting for a resource.
462387
Differences between Synchronous and Asynchronous Counter. Counters are of two types depending upon clock pulse applied. ... In synchronous counter, all flip flops are triggered with same clock simultaneously. In asynchronous counter, different flip flops are triggered with different clock, not simultaneously.
1155132
In programming, synchronous operations block instructions until the task is completed, while asynchronous operations can execute without blocking other operations. Asynchronous operations are generally completed by firing an event or by calling a provided callback function.
996481
From the man page: The pthread_mutex_lock() function locks mutex. If the mutex is already locked, the calling thread will block until the mutex becomes available. So yes - your thread is blocked until the lock is available and it can obtain it.
729883
Semaphore is defined as a variable that is non-negative and shared between threads. ... Counting Semaphore has no mutual exclusion whereas Binary Semaphore has Mutual exclusion. Semaphore means a signaling mechanism whereas Mutex is a locking mechanism. Semaphore allows more than one thread to access the critical section.
1102433
Processes that attempt monitor entry while the monitor is occupied are blocked on a monitor entry queue. To synchronize tasks within the monitor, a condition variable is used to delay processes executing in a monitor. It may be declared only within a monitor and has no numeric value like semaphores do.
482421
A semaphore has two parts : a counter, and a list of tasks waiting to access a particular resource. ... In a binary semaphore, the counter logically goes between 0 and 1. You can think of it as being similar to a lock with two values : open/closed. A counting semaphore has multiple values for count.
1349476
['Deadlock prevention or avoidance - Do not allow the system to get into a deadlocked state.', 'Deadlock detection and recovery - Abort a process or preempt some resources when deadlocks are detected.']
753969
pthread_join() is a blocking call, it will block the calling thread until the other thread ends.
1098145
The difference between mutually exclusive and independent events is: a mutually exclusive event can simply be defined as a situation when two events cannot occur at same time whereas independent event occurs when one event remains unaffected by the occurrence of the other event.
1259386
The basic difference between semaphore and monitor is that the semaphore is an integer variable S which indicate the number of resources available in the system whereas, the monitor is the abstract data type which allows only one process to execute in critical section at a time.