109 lines
3.3 KiB
C
109 lines
3.3 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/reent.h>
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#include "esp_attr.h"
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/* This function is not part on newlib API, it is defined in libc/stdio/local.h
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* There is no nice way to get __cleanup member populated while avoiding __sinit,
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* so extern declaration is used here.
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*/
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extern void _cleanup_r(struct _reent* r);
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/**
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* This is the replacement for newlib's _REENT_INIT_PTR and __sinit.
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* The problem with __sinit is that it allocates three FILE structures
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* (stdin, stdout, stderr). Having individual standard streams for each task
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* is a bit too much on a small embedded system. So we point streams
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* to the streams of the global struct _reent, which are initialized in
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* startup code.
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*/
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void IRAM_ATTR esp_reent_init(struct _reent* r)
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{
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memset(r, 0, sizeof(*r));
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r->_stdout = _GLOBAL_REENT->_stdout;
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r->_stderr = _GLOBAL_REENT->_stderr;
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r->_stdin = _GLOBAL_REENT->_stdin;
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r->__cleanup = &_cleanup_r;
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r->__sdidinit = 1;
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r->__sglue._next = NULL;
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r->__sglue._niobs = 0;
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r->__sglue._iobs = NULL;
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}
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/* only declared in private stdio header file, local.h */
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extern void __sfp_lock_acquire();
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extern void __sfp_lock_release();
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void esp_reent_cleanup()
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{
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struct _reent* r = __getreent();
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/* Clean up storage used by mprec functions */
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if (r->_mp) {
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if (_REENT_MP_FREELIST(r)) {
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for (int i = 0; i < _Kmax; ++i) {
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struct _Bigint *cur, *next;
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next = _REENT_MP_FREELIST(r)[i];
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while (next) {
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cur = next;
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next = next->_next;
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free(cur);
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}
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}
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}
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free(_REENT_MP_FREELIST(r));
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free(_REENT_MP_RESULT(r));
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}
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/* Clean up "glue" (lazily-allocated FILE objects) */
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struct _glue* prev = &_GLOBAL_REENT->__sglue;
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for (struct _glue* cur = _GLOBAL_REENT->__sglue._next; cur != NULL;) {
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if (cur->_niobs == 0) {
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cur = cur->_next;
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continue;
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}
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bool has_open_files = false;
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for (int i = 0; i < cur->_niobs; ++i) {
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FILE* fp = &cur->_iobs[i];
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if (fp->_flags != 0) {
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has_open_files = true;
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break;
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}
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}
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if (has_open_files) {
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prev = cur;
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cur = cur->_next;
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continue;
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}
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struct _glue* next = cur->_next;
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prev->_next = next;
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free(cur);
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cur = next;
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}
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/* Clean up various other buffers */
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free(r->_mp);
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r->_mp = NULL;
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free(r->_r48);
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r->_r48 = NULL;
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free(r->_localtime_buf);
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r->_localtime_buf = NULL;
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free(r->_asctime_buf);
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r->_asctime_buf = NULL;
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}
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