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#include <rtx51tny.h>

char isr_send_signal (
  unsigned char task_id);     /* Task to signal */

The isr_send_signal function sends a signal to task task_id. If the specified task is already waiting for a signal, this function readies the task for execution but does not start it. Otherwise, the signal is stored in the signal flag of the task.


  • This function is part of the RTX51 Tiny Real-Time Operating System which is included only with the PK51 Professional Developer's Kit.
  • This function may be called only from interrupt functions.
Return Value

The isr_send_signal function returns a value of 0 if successful and -1 if the specified task does not exist.

See Also

os_clear_signal, os_send_signal, os_wait

#include <rtx51tny.h>

void tst_isr_send_signal (void) interrupt 2
isr_send_signal (8);    /* signal task #8 */
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