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osl::Condition Class Reference

Condition variable. More...

`#include <conditn.hxx>`

## Public Types
enum | Result { result_ok = osl_cond_result_ok, result_error = osl_cond_result_error, result_timeout = osl_cond_result_timeout }

## Public Member Functions
| Condition ()
| Create a condition. More...
| ~Condition ()
| Release the OS-structures and free condition data-structure. More...
void | set ()
| Release all waiting threads, check returns true. More...
void | reset ()
| Reset condition to false: wait() will block, check() returns false. More...
Result | wait (const TimeValue *pTimeout=NULL)
| Blocks the calling thread until condition is set. More...
bool | check ()
| Checks if the condition is set without blocking. More...

## Detailed Description

Condition variable.

A condition variable is essentially an object that is initially cleared which a thread waits on until it is "set". It allows a thread to synchronize execution by allowing other threads to wait for the condition to change before that thread then continues execution.

Deprecated:
  use C++11's std::condition_variable instead for a more robust and helpful condition.

Attention
  Warning: the Condition abstraction is inadequate for any situation where there may be multiple threads setting, waiting, and resetting the same condition. It can only be used to synchronise interactions between two threads cf. lost wakeups in http://www.cs.wustl.edu/~schmidt/win32-cv-1.html

## Member Enumeration Documentation

## ◆ Result

enum osl::Condition::Result

Enumerator
result_ok | Successful completion.
result_error | Error occurred. See also osl_getLastSocketError()
result_timeout | Blocking operation timed out.

## Constructor & Destructor Documentation

## ◆ Condition()

osl::Condition::Condition | ( |  | ) |
| inline

Create a condition.

Deprecated:
  use C++11's std::condition_variable instead for a more robust and helpful condition.

## ◆ ~Condition()

osl::Condition::~Condition | ( |  | ) |
| inline

Release the OS-structures and free condition data-structure.

Deprecated:
  use C++11's std::condition_variable instead for a more robust and helpful condition.

## Member Function Documentation

## ◆ check()

bool osl::Condition::check | ( |  | ) |
| inline

Checks if the condition is set without blocking.

Return values

  true | condition is set
  false | condition is not set

Deprecated:
  use C++11's std::condition_variable instead for a more robust and helpful condition.

## ◆ reset()

void osl::Condition::reset | ( |  | ) |
| inline

Reset condition to false: wait() will block, check() returns false.

Deprecated:
  use C++11's std::condition_variable instead for a more robust and helpful condition.

## ◆ set()

void osl::Condition::set | ( |  | ) |
| inline

Release all waiting threads, check returns true.

Deprecated:
  use C++11's std::condition_variable instead for a more robust and helpful condition.

## ◆ wait()

Result osl::Condition::wait | ( | const TimeValue * | pTimeout = `NULL` | ) |
| inline

Blocks the calling thread until condition is set.

Parameters

  [in] | pTimeout | Timeout to wait before ending the condition. Defaults to NULL

Return values

  result_ok | finished successfully
  result_error | error occurred
  result_timeout | timed out

Deprecated:
  use C++11's std::condition_variable instead for a more robust and helpful condition.

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

- osl/conditn.hxx