mbed-signal-behavior-test.cpp

/*
This is a simple program for the MBED intended to determine what happens if a signal for a thread is
set before the corresponding wait is called.  It behaves as expected, so the bug I'm tracking down is somewhere else...
*/

#include <mbed.h>
#include <rtos.h>
#include <cmsis_os.h>

void thread(const void* arg) {
    printf("thread waiting on signal 1\r\n");
    Thread::signal_wait(1);
    printf("thread received signal 1\r\n");

    printf("thread waiting on signal 2\r\n");
    Thread::signal_wait(2);
    printf("thread received signal 2\r\n");
}

int main() {
    // set baud rate to higher value than the default for faster terminal
    Serial s(MBED_UARTUSB);
    s.baud(57600);

    printf("\r\n\r\n\r\n************************\r\n");

    Thread secondary(thread, nullptr, osPriorityNormal);
    Thread::wait(100);
    printf("initialized thread\r\n");

    Thread::wait(100);

    secondary.signal_set(2);
    Thread::wait(100);
    secondary.signal_set(1);

    while (true) {
        Thread::yield();
    }
}