(1) Code that must be executed by one thread while all other threads in the process are suspended. (2) In the Windows operating system, a synchronization object. A critical section is not a kernel object; that is, it is not managed by the low-level components of the operating system and is not manipulated using handles. (3) A small section of code that requires exclusive access to some shared data before the code can execute. Critical threads synchronize threads only within a single process, and they allow only one thread at a time to gain access to a region of data. See mutex, semaphore, and event. Contrast with kernel object.
(1) In the OS/2 operating system, code that must be executed by one thread while all other threads in the process are suspended. Deadlocks can result if calls are made in an OS/2 critical section. A mutex semaphore is usually a preferable control construct. See semaphore. (2) In the Windows operating system, a synchronization object. A critical section object is not managed by the low-level components of the operating system and is not manipulated using handles. Critical section objects synchronize threads only within a single process, and they allow only one thread at a time to gain access to a region of data. See event object, mutex object, semaphore. Contrast with kernel object.
A piece of code that temporarily has exclusive access to a resource, such as device-state data stored in a device extension to which access must be synchronized among some number of routines.
A critical section of code is one in which data that may be seen by other threads are inconsistent. At a higher level, a critical section can be viewed as a section of code in which a guarantee you make to other threads about the state of some data may not be true.
(n.) a section of program that can be executed by at most one process at a time.
A section of code in which you need exclusive access to an object or property to ensure data consistency.
a block of code in a thread that accesses one or more shared variables in a read-update-write fashion
a block of code that should be single-threaded, meaning only one thread should be executing that section of the code at any given time
a block of code which only one process (generally) can run at one time
a chunk of code that can be executed by only one thread at a time
a code section that can only be accessed by a single thread at any given time
a code sequence that must not be executed by more than one process at the same time
a lightweight mechanism for allowing only one thread at a time to execute a given piece of code
a part of a program in which is it necessary to have exclusive access to shared data
a piece of code which you want to be synchronized to prevent multiple thread access
a region of code in which a process needs exclusive access to a shared object such as a variable or file
a section of code that accesses a non-sharable resource
a section of code that requires exclusive access to some set of shared data before it can be executed and that is used only by the threads within a single process
a segment of code which must not be pre-empted or run by multiple threads concurrently
a synchronized method or block
A portion of code that must be executed by only one process/thread at a time, typically because it updates shared variables.
A section of code that is not allowed to be preempted. A critical section is entered and exited using the critical_enter API.
A segment of code in which a thread uses resources (such as certain instance variables) that can be used by other threads, but that must not be used by them at the same time.
A code passage that must be executed "serially" (i.e. by only one thread at a time). The simplest from of critical section enforcement is via a mutex.
A Kernel object used to serialise access to a resource which may only be shared between the threads within a process. Access to the critical section is through an RCriticalSection handle.
A section of code that should be executed by only one processor at a time. Typically such a section involves data that must be read, modified, and rewritten; if processor 2 is allowed to read the data after processor 1 has read it but before processor 1 has updated it, then processor 1's update will be overwritten and lost when processor 2 writes its update. Spin locks or semaphores are used to ensure strict sequential execution of a critical section of code by one processor at a time.
A sequence of instructions that must be executed in sequence and without interruption to guarantee correct operation of the software. If the instructions are interrupted, a race condition might occur.
In concurrent programming a critical section is a piece of code that accesses a shared resource (data structure or device) that must not be concurrently accessed by more than one thread of execution. A critical section will usually terminate in fixed time, and a thread, task or process will only have to wait a fixed time to enter it. Some synchronization mechanism is required at the entry and exit of the critical section to ensure exclusive use, for example a semaphore.
