CooCox CoOS User's Guide

6.7 Semaphores
6.7.1 CoCreateSem()
Function Prototype:
OS_EventID CoCreateSem(
Descriptions:
Create a semaphore.
Parameters:
[in] initCnt
U16 initCnt,
U16 maxCnt,
U8 sortType
);
the initial volume of the effective number of semaphores
[in] maxCnt
The maximum value of the semaphore
[in] sortType
arrangement types:
EVENT_SORT_TYPE_FIFO,
EVENT_SORT_TYPE_PRIO,
Returns:
Semaphore ID, create successfully
-1, create failed
Example usage:
#include "CCRTOS.h"
OS_EventID semaphore;
void TaskN (void *pdata)
{
}
...
/* Create a semaphore */
FIFO order
Preemptive Priority order
semaphore = CoCreateSem (1, 10, EVENT_SORT_TYPE_FIFO);
if (semaphore == E_CREATE_FAIL)
{
}
else
{
}
printf("Create semaphore failed !\n");
printf("Semaphore ID : %d \n", semaphore);
...
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