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condition.h File Reference

Condition classes for thread sychronization and timing. More...

#include <ucommon/cpr.h>
#include <ucommon/timers.h>
#include <ucommon/memory.h>
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Namespaces

namespace  ucommon
 Common namespace for all ucommon objects.
 

Typedefs

typedef ConditionalAccess ucommon::accesslock_t
 Convenience type for scheduling access.
 
typedef Barrier ucommon::barrier_t
 Convenience type for using thread barriers.
 
typedef Semaphore ucommon::semaphore_t
 Convenience type for using counting semaphores.
 

Functions

class ucommon::__attribute__ ((visibility("default"))) ExclusiveProtocol
 An exclusive locking protocol interface base.
 

Variables

class __attribute__((visibility("default"))) Conditional class __attribute__((visibility("default"))) ConditionalAccess class __attribute__((visibility("default"))) ConditionalLock class __attribute__((visibility("default"))) Barrier class __attribute__((visibility("default"))) Semaphore typedef ConditionalLock ucommon::condlock_t
 The conditional is a common base for other thread synchronizing classes.
 

Detailed Description

Condition classes for thread sychronization and timing.

The theory behind ucommon sychronization objects is that all upper level sychronization objects can be formed directly from a mutex and conditional. This includes semaphores, barriers, rwlock, our own specialized conditional lock, resource-bound locking, and recursive exclusive locks. Using only conditionals means we are not dependent on platform specific pthread implementations that may not implement some of these, and hence improves portability and consistency. Given that our rwlocks are recursive access locks, one can safely create read/write threading pairs where the read threads need not worry about deadlocks and the writers need not either if they only write-lock one instance at a time to change state.

Definition in file condition.h.