PlatformMutex
PlatformMutex class hierarchy
You can use the PlatformMutex class to synchronize the execution of threads.
The Mbed OS drivers use the PlatformMutex class instead of Mutex. This enables the use of drivers when the Mbed OS is compiled without the RTOS. For examples, please see AnalogIn, BusOut, SPI and I2C.
Note: For the standard use of RTOS mutexes, please see Mutex.
PlatformMutex class reference
| Public Member Functions | |
| PlatformMutex () | |
| Create a PlatformMutex object. More... | |
| ~PlatformMutex () | |
| PlatformMutex destructor. More... | |
| void | lock () |
| Wait until a PlatformMutex becomes available. More... | |
| void | unlock () |
| Unlock a PlatformMutex that the same thread has previously locked. More... | |
PlatformMutex example
/*
* Copyright (c) 2017 - 2020 Arm Limited and affiliates.
* SPDX-License-Identifier: Apache-2.0
*/
#include "mbed.h"
PlatformMutex stdio_mutex;
Thread t2;
Thread t3;
void notify(const char *name, int state)
{
stdio_mutex.lock();
printf("%s: %d\n\r", name, state);
stdio_mutex.unlock();
}
void test_thread(void const *args)
{
while (true) {
notify((const char *)args, 0);
ThisThread::sleep_for(1000);
notify((const char *)args, 1);
ThisThread::sleep_for(1000);
}
}
int main()
{
t2.start(callback(test_thread, (void *)"Th 2"));
t3.start(callback(test_thread, (void *)"Th 3"));
test_thread((void *)"Th 1");
}