diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/tests/rtos/mbed/mutex/main.cpp')
-rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/tests/rtos/mbed/mutex/main.cpp | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/tests/rtos/mbed/mutex/main.cpp b/tmk_core/tool/mbed/mbed-sdk/libraries/tests/rtos/mbed/mutex/main.cpp new file mode 100644 index 0000000000..80d49a189c --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/tests/rtos/mbed/mutex/main.cpp @@ -0,0 +1,87 @@ +#include "mbed.h" +#include "test_env.h" +#include "rtos.h" + +#define THREAD_DELAY 50 +#define SIGNALS_TO_EMIT 100 + +/* + * The stack size is defined in cmsis_os.h mainly dependent on the underlying toolchain and + * the C standard library. For GCC, ARM_STD and IAR it is defined with a size of 2048 bytes + * and for ARM_MICRO 512. Because of reduce RAM size some targets need a reduced stacksize. + */ +#if defined(TARGET_STM32L053R8) || defined(TARGET_STM32L053C8) + #define STACK_SIZE DEFAULT_STACK_SIZE/4 +#else + #define STACK_SIZE DEFAULT_STACK_SIZE +#endif + +void print_char(char c = '*') { + printf("%c", c); + fflush(stdout); +} + +Mutex stdio_mutex; +DigitalOut led(LED1); + +volatile int change_counter = 0; +volatile bool changing_counter = false; +volatile bool mutex_defect = false; + +bool manipulate_protected_zone(const int thread_delay) { + bool result = true; + + stdio_mutex.lock(); // LOCK + if (changing_counter == true) { + // 'e' stands for error. If changing_counter is true access is not exclusively + print_char('e'); + result = false; + mutex_defect = true; + } + changing_counter = true; + + // Some action on protected + led = !led; + change_counter++; + print_char('.'); + Thread::wait(thread_delay); + + changing_counter = false; + stdio_mutex.unlock(); // UNLOCK + return result; +} + +void test_thread(void const *args) { + const int thread_delay = int(args); + while (true) { + manipulate_protected_zone(thread_delay); + } +} + +int main() { + MBED_HOSTTEST_TIMEOUT(20); + MBED_HOSTTEST_SELECT(default); + MBED_HOSTTEST_DESCRIPTION(Mutex resource lock); + MBED_HOSTTEST_START("RTOS_2"); + + const int t1_delay = THREAD_DELAY * 1; + const int t2_delay = THREAD_DELAY * 2; + const int t3_delay = THREAD_DELAY * 3; + Thread t2(test_thread, (void *)t2_delay, osPriorityNormal, STACK_SIZE); + Thread t3(test_thread, (void *)t3_delay, osPriorityNormal, STACK_SIZE); + + while (true) { + // Thread 1 action + Thread::wait(t1_delay); + manipulate_protected_zone(t1_delay); + if (change_counter >= SIGNALS_TO_EMIT or mutex_defect == true) { + t2.terminate(); + t3.terminate(); + break; + } + } + + fflush(stdout); + MBED_HOSTTEST_RESULT(!mutex_defect); + return 0; +} |