arm_hal_interrupt.c

00001 /*
00002  * Copyright (c) 2016 ARM Limited, All Rights Reserved
00003  */
00004 
00005 #include "arm_hal_interrupt.h"
00006 #include "arm_hal_interrupt_private.h"
00007 #include "cmsis_os2.h"
00008 #include "mbed_rtos_storage.h"
00009 #include <mbed_assert.h>
00010 
00011 static uint8_t sys_irq_disable_counter;
00012 
00013 static mbed_rtos_storage_mutex_t critical_mutex;
00014 static const osMutexAttr_t critical_mutex_attr = {
00015   .name = "nanostack_critical_mutex",
00016   .attr_bits = osMutexRecursive | osMutexPrioInherit | osMutexRobust,
00017   .cb_mem = &critical_mutex,
00018   .cb_size = sizeof critical_mutex,
00019 };
00020 static osMutexId_t critical_mutex_id;
00021 
00022 void platform_critical_init(void)
00023 {
00024     critical_mutex_id = osMutexNew(&critical_mutex_attr);
00025     MBED_ASSERT(critical_mutex_id);
00026 }
00027 
00028 void platform_enter_critical(void)
00029 {
00030     osMutexAcquire(critical_mutex_id, osWaitForever);
00031     sys_irq_disable_counter++;
00032 }
00033 
00034 void platform_exit_critical(void)
00035 {
00036     --sys_irq_disable_counter;
00037     osMutexRelease(critical_mutex_id);
00038 }