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The following shows the service calls provided by the RI850V4 as the synchronization and communication functions (semaphores).

Table 16-3 Synchronization and Communication Functions (Semaphores)


Service Call	Function	Origin of Service Call
wai_sem	Acquire semaphore resource (waiting forever)	Task
pol_sem	Acquire semaphore resource (polling)	Task, Non-task, Initialization routine
ipol_sem	Acquire semaphore resource (polling)	Task, Non-task, Initialization routine
twai_sem	Acquire semaphore resource (with timeout)	Task
sig_sem	Release semaphore resource	Task, Non-task, Initialization routine
isig_sem	Release semaphore resource	Task, Non-task, Initialization routine
ref_sem	Reference semaphore state	Task, Non-task, Initialization routine
iref_sem	Reference semaphore state	Task, Non-task, Initialization routine