# thread.h File Reference

## Classes
class | wxCondition
| wxCondition variables correspond to pthread conditions or to Win32 event objects. More...
class | wxCriticalSectionLocker
| This is a small helper class to be used with wxCriticalSection objects. More...
class | wxThreadHelper
| The wxThreadHelper class is a mix-in class that manages a single background thread, either detached or joinable (see wxThread for the differences). More...
class | wxCriticalSection
| A critical section object is used for exactly the same purpose as a wxMutex. More...
class | wxThread
| A thread is basically a path of execution through a program. More...
class | wxSemaphore
| wxSemaphore is a counter limiting the number of threads concurrently accessing a shared resource. More...
class | wxMutexLocker
| This is a small helper class to be used with wxMutex objects. More...
class | wxMutex
| A mutex object is a synchronization object whose state is set to signaled when it is not owned by any thread, and nonsignaled when it is owned. More...
## Defines
#define | wxCRIT_SECT_DECLARE(cs)
| This macro declares a (static) critical section object named cs if `wxUSE_THREADS` is 1 and does nothing if it is 0.
#define | wxCRIT_SECT_DECLARE_MEMBER(cs)
| This macro declares a critical section object named cs if `wxUSE_THREADS` is 1 and does nothing if it is 0.
#define | wxCRIT_SECT_LOCKER(name, cs)
| This macro creates a wxCriticalSectionLocker named name and associated with the critical section cs if `wxUSE_THREADS` is 1 and does nothing if it is 0.
#define | wxCRITICAL_SECTION(name)
| This macro combines wxCRIT_SECT_DECLARE() and wxCRIT_SECT_LOCKER(): it creates a static critical section object and also the lock object associated with it.
#define | wxLEAVE_CRIT_SECT(critical_section)
| This macro is equivalent to critical_section.Leave() if `wxUSE_THREADS` is 1 and does nothing if it is 0.
#define | wxENTER_CRIT_SECT(critical_section)
| This macro is equivalent to critical_section.Enter() if `wxUSE_THREADS` is 1 and does nothing if it is 0.
## Enumerations
enum | wxCondError { wxCOND_NO_ERROR = 0, wxCOND_INVALID, wxCOND_TIMEOUT, wxCOND_MISC_ERROR }
| See wxCondition. More...
enum | wxCriticalSectionType { wxCRITSEC_DEFAULT, wxCRITSEC_NON_RECURSIVE }
| Possible critical section types. More...
enum | wxThreadWait { wxTHREAD_WAIT_BLOCK, wxTHREAD_WAIT_YIELD, wxTHREAD_WAIT_DEFAULT = wxTHREAD_WAIT_YIELD }
| The possible thread wait types. More...
enum | wxThreadKind { wxTHREAD_DETACHED, wxTHREAD_JOINABLE }
| The possible thread kinds. More...
enum | wxThreadError { wxTHREAD_NO_ERROR = 0, wxTHREAD_NO_RESOURCE, wxTHREAD_RUNNING, wxTHREAD_NOT_RUNNING, wxTHREAD_KILLED, wxTHREAD_MISC_ERROR }
| The possible thread errors. More...
enum | { WXTHREAD_MIN_PRIORITY = 0u, WXTHREAD_DEFAULT_PRIORITY = 50u, WXTHREAD_MAX_PRIORITY = 100u }
| Defines the interval of priority. More...
enum | wxSemaError { wxSEMA_NO_ERROR = 0, wxSEMA_INVALID, wxSEMA_BUSY, wxSEMA_TIMEOUT, wxSEMA_OVERFLOW, wxSEMA_MISC_ERROR }
| See wxSemaphore. More...
enum | wxMutexType { wxMUTEX_DEFAULT, wxMUTEX_RECURSIVE }
| The possible wxMutex kinds. More...
enum | wxMutexError { wxMUTEX_NO_ERROR = 0, wxMUTEX_INVALID, wxMUTEX_DEAD_LOCK, wxMUTEX_BUSY, wxMUTEX_UNLOCKED, wxMUTEX_TIMEOUT, wxMUTEX_MISC_ERROR }
| The possible wxMutex errors. More...
## Functions
bool | wxIsMainThread ()
| Returns true if this thread is the main one.
void | wxMutexGuiEnter ()
| This function must be called when any thread other than the main GUI thread wants to get access to the GUI library.
void | wxMutexGuiLeave ()
| This function is only defined on platforms which support preemptive threads.

## Enumeration Type Documentation

anonymous enum

Defines the interval of priority.

Enumerator:

  WXTHREAD_MIN_PRIORITY |
  WXTHREAD_DEFAULT_PRIORITY |
  WXTHREAD_MAX_PRIORITY |

enum wxCondError

See wxCondition.

Enumerator:

  wxCOND_NO_ERROR |
  wxCOND_INVALID |
  wxCOND_TIMEOUT | WaitTimeout() has timed out.
  wxCOND_MISC_ERROR |

enum wxCriticalSectionType

Possible critical section types.

Enumerator:

  wxCRITSEC_DEFAULT |
  wxCRITSEC_NON_RECURSIVE | Recursive critical section under both Windows and Unix. Non-recursive critical section under Unix, recursive under Windows

enum wxMutexError

The possible wxMutex errors.

Enumerator:

  wxMUTEX_NO_ERROR | The operation completed successfully.
  wxMUTEX_INVALID | The mutex hasn't been initialized.
  wxMUTEX_DEAD_LOCK | The mutex is already locked by the calling thread.
  wxMUTEX_BUSY | The mutex is already locked by another thread.
  wxMUTEX_UNLOCKED | An attempt to unlock a mutex which is not locked.
  wxMUTEX_TIMEOUT | wxMutex::LockTimeout() has timed out.
  wxMUTEX_MISC_ERROR | Any other error.

enum wxMutexType

The possible wxMutex kinds.

Enumerator:

  wxMUTEX_DEFAULT | Normal non-recursive mutex: try to always use this one.
  wxMUTEX_RECURSIVE | Recursive mutex: don't use these ones with wxCondition.

enum wxSemaError

See wxSemaphore.

Enumerator:

  wxSEMA_NO_ERROR |
  wxSEMA_INVALID | semaphore hasn't been initialized successfully
  wxSEMA_BUSY | returned by TryWait() if Wait() would block
  wxSEMA_TIMEOUT | returned by WaitTimeout()
  wxSEMA_OVERFLOW | Post() would increase counter past the max.
  wxSEMA_MISC_ERROR |

enum wxThreadError

The possible thread errors.

Enumerator:

  wxTHREAD_NO_ERROR | No error.
  wxTHREAD_NO_RESOURCE | No resource left to create a new thread.
  wxTHREAD_RUNNING | The thread is already running.
  wxTHREAD_NOT_RUNNING | The thread isn't running.
  wxTHREAD_KILLED | Thread we waited for had to be killed.
  wxTHREAD_MISC_ERROR | Some other error.

enum wxThreadKind

The possible thread kinds.

Enumerator:

  wxTHREAD_DETACHED | Detached thread.
  wxTHREAD_JOINABLE | Joinable thread.

enum wxThreadWait

The possible thread wait types.

Since:
  2.9.2

Enumerator:

  wxTHREAD_WAIT_BLOCK | No events are processed while waiting. This is the default under all platforms except for wxMSW.
  wxTHREAD_WAIT_YIELD | Yield for event dispatching while waiting. This flag is dangerous as it exposes the program using it to unexpected reentrancies in the same way as calling wxYield() function does so you are strongly advised to avoid its use and not wait for the thread termination from the main (GUI) thread at all to avoid making your application unresponsive. Also notice that this flag is not portable as it is only implemented in wxMSW and simply ignored under the other platforms.
  wxTHREAD_WAIT_DEFAULT | Default wait mode for wxThread::Wait() and wxThread::Delete(). For compatibility reasons, the default wait mode is currently wxTHREAD_WAIT_YIELD if WXWIN_COMPATIBILITY_2_8 is defined (and it is by default). However, as mentioned above, you're strongly encouraged to not use wxTHREAD_WAIT_YIELD and pass wxTHREAD_WAIT_BLOCK to wxThread method explicitly.

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