77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
/*
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* Stub functions called by binary espressif libraries
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*
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* Part of esp-open-rtos
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* Copyright (C) 2015 Superhouse Automation Pty Ltd
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* BSD Licensed as described in the file LICENSE
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "FreeRTOS.h"
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/* SDK uses errno. errno was defined in libudhcp.a
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but that library has been removed. */
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int errno;
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/* newlib uses __errno in some contexts */
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int *__errno(void) {
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return &errno;
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}
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/* libc memory management functions.
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Many of these are linked from the RTOS SDK blob libraries.
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In esp_iot_rtos_sdk these are aliased to exception-safe versions of
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the FreeRTOS functions. I think the rationale is that they're
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sometimes called in exception contexts (ESPTODO: Verify this).
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For now these are exception-safe wrappers to the FreeRTOS versions.
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*/
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void *malloc(size_t nbytes) {
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void *res;
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portENTER_CRITICAL();
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res = pvPortMalloc(nbytes);
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portEXIT_CRITICAL();
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return res;
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}
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void *calloc(size_t count, size_t size) {
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void *res;
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size_t nbytes = count * size;
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portENTER_CRITICAL();
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res = pvPortMalloc(nbytes);
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portEXIT_CRITICAL();
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if(res) {
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memset(res, 0, nbytes);
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}
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return res;
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}
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void *zalloc(size_t nbytes) {
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return calloc(1, nbytes);
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}
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void *realloc(void *old, size_t newsize) {
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void *new;
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portENTER_CRITICAL();
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if(newsize == 0) {
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vPortFree(old);
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return 0;
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}
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/* realloc implementation borrowed from esp_iot_rtos_sdk, could be better I think */
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new = pvPortMalloc(newsize);
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if (new) {
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memcpy(new, old, newsize);
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vPortFree(old);
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}
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portEXIT_CRITICAL();
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return new;
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}
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void free(void *ptr) {
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portENTER_CRITICAL();
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vPortFree(ptr);
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portEXIT_CRITICAL();
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}
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