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deadlock    音标拼音: [d'ɛdl,ɑk]
n. 僵局,停顿
vt.
vi. (使)停顿,(使)相持不下

僵局,停顿(使)停顿,(使)相持不下

deadlock
死锁

deadlock
死锁

deadlock
n 1: a situation in which no progress can be made or no
advancement is possible; "reached an impasse on the
negotiations" [synonym: {deadlock}, {dead end}, {impasse},
{stalemate}, {standstill}]

deadlock \dead"lock`\, n.
1. A lock which is not self-latching, but requires a key to
throw the bolt forward.
[1913 Webster]

2. A counteraction of things, which produces an entire
stoppage; a complete obstruction of action.
[1913 Webster]

Things are at a deadlock. --London
Times.
[1913 Webster]

The Board is much more likely to be at a deadlock of
two to two. --The Century.
[1913 Webster]

83 Moby Thesaurus words for "deadlock":
Tweedledum and Tweedledee, arrest, bell, blind alley, block, box,
brake, bring to, bring up short, cessation, check, checkmate,
condition, corner, cul-de-sac, cut short, cutoff, dam, dead end,
dead heat, dead set, dead stand, dead stop, dead-end street,
dilemma, draw, draw rein, dying down, ebb, ebbing, end, endgame,
ending, even break, extremity, fair shake, final whistle, freeze,
full stop, grinding halt, gun, halt, hole, impasse, knotted score,
lock, lockout, neck-and-neck race, photo finish, plight, posture,
predicament, pull up, put paid to, quandary, sit-down strike,
situation, slow down, stalemate, stall, stand, stand-off, standoff,
standstill, state, stay, stem, stem the tide, stillstand, stop,
stop cold, stop dead, stop short, stoppage, strike, stymie,
subsidence, the same, tie, walkout, wane, waning, work stoppage

A situation where two or more
{processes} are unable to proceed because each is waiting for
one of the others to do something.

A common example is a program waiting for output from a server
while the server is waiting for more input from the
controlling program before outputting anything. It is
reported that this particular flavour of deadlock is sometimes
called a "starvation deadlock", though the term "starvation"
is more properly used for situations where a program can never
run simply because it never gets high enough priority.

Another common flavour is "constipation", in which each
process is trying to send stuff to the other but all buffers
are full because nobody is reading anything). See {deadly
embrace}.

Another example, common in {database} programming, is two
processes that are sharing some resource (e.g. read access to
a {table}) but then both decide to wait for exclusive
(e.g. write) access.

The term "deadly embrace" is mostly synonymous, though usually
used only when exactly two processes are involved. This is
the more popular term in Europe, while {deadlock} predominates
in the United States.

Compare: {livelock}. See also {safety property}, {liveness
property}.

[{Jargon File}]

(2000-07-26)

deadlock: n. 1. [techspeak] A situation wherein two or more processes are unable
to proceed because each is waiting for one of the others to do something.
A common example is a program communicating to a server, which may find
itself waiting for output from the server before sending anything more to
it, while the server is similarly waiting for more input from the
controlling program before outputting anything. (It is reported that this
particular flavor of deadlock is sometimes called a starvation deadlock, though the term starvation is more properly used for situations
where a program can never run simply because it never gets high enough
priority. Another common flavor is constipation, in which each process is trying
to send stuff to the other but all buffers are full because nobody is
reading anything.) See deadly embrace.


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  • multithreading - What is a deadlock? - Stack Overflow
    A deadlock is a state of a system in which no single process thread is capable of executing an action As mentioned by others, a deadlock is typically the result of a situation where each process thread wishes to acquire a lock to a resource that is already locked by another (or even the same) process thread
  • An async await example that causes a deadlock - Stack Overflow
    Deadlock The top-level method is blocking the context thread, waiting for GetJsonAsync to complete, and GetJsonAsync is waiting for the context to be free so it can complete For the UI example, the "context" is the UI context; for the ASP NET example, the "context" is the ASP NET request context
  • Whats the difference between deadlock and livelock?
    Can somebody please explain with examples (of code) what is the difference between deadlock and livelock?
  • What is a deadlock in a database? - Stack Overflow
    What is a deadlock in SQL Server and when it arises? What are the issues with deadlock and how to resolve it?
  • Deadlocks in Oracle - Stack Overflow
    Oracle detects a deadlock automatically, throws ORA-00060: deadlock detected while waiting for resource, and rolls back one of the transactions involved in the deadlock which Oracle decided as the victim
  • What are common reasons for deadlocks? - Stack Overflow
    0 Deadlock occurs mainly when there are multiple dependent locks exist In a thread and another thread tries to lock the mutex in reverse order occurs One should pay attention to use a mutex to avoid deadlocks Be sure to complete the operation after releasing the lock
  • c# - Entity Framework Deadlocks - Stack Overflow
    Why deadlocks? In order to understand why you are running into a deadlock, it's important to understand what the Serializable Isolation Level means The documentation of SQL Server Isolation Levels says the following about Serializable (emphasis mine): Statements cannot read data that has been modified but not yet committed by other transactions
  • How to catch SqlException caused by deadlock? - Stack Overflow
    A deadlock detected by the database will effectively rollback the transaction in which you were running (if any), while the connection is kept open in NET Retrying that operation (in that same connection), means it will be executed in a transactionless context and this could lead to data corruption It's important to be aware of this
  • Why do deadlocks happen in SQL Server? - Stack Overflow
    The replies are correct about the classic deadlock problem, but there's one more cause of deadlocks, called "lock escalation", that can happen even if all threads follow the same order of updates, and it's usually raised on SELECT statements
  • c# - await vs Task. Wait - Deadlock? - Stack Overflow
    On my blog, I go into the details of how blocking in asynchronous code causes deadlock await will asynchronously wait until the task completes This means the current method is "paused" (its state is captured) and the method returns an incomplete task to its caller





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