====== OSA : OS_Bsem_Wait ======
<color blue>**OS_Bsem_Wait (bsem)**</color>\\ 
=== ===

{{osa:ref:attr_call_task.png|Allowed only in task}}{{osa:ref:attr_call_ct_sw.png|Switches context}}

Wait for binary semaphore.

=== Call allowed: ===
Only in task


=== Parameters: ===
{| class = "fpl"
|-
|//''bsem''//
|Binary semaphore's ID. Number of binary semaphores is set by ##[[en:osa:ref:appendix:configuration#Data contents|OS_BSEMS]]## constant in ##[[en:osa:ref:appendix:configuration|OSAcfg.h]]##
|}


=== Returns: ===
nothing

=== Example: ===
<code cpp>
void Task (void)
{
    for (;;) {
        /*...*/
        OS_Bsem_Wait(5);   // Wait for binary semaphore #5
        /*...*/
    }
}
</code>


=== Old style name ===
<color gray>**OS_WaitBSem**</color>\\ 








=== See also ===
  * [[en:osa:ref:allservices:OS_Bsem_Set|OS_Bsem_Set]]
  * [[en:osa:ref:allservices:OS_Bsem_Reset|OS_Bsem_Reset]]
  * [[en:osa:ref:allservices:OS_Bsem_Check|OS_Bsem_Check]]
  * [[en:osa:ref:allservices:OS_Bsem_Switch|OS_Bsem_Switch]]

  * [[en:osa:ref:allservices:OS_Bsem_Wait_TO|OS_Bsem_Wait_TO]]

----
  * [[en:osa:ref:services:alphabetical|Alphabetical]]
  * [[en:osa:ref:services:brieflist|All services]]
~~UP~~