49 lines
1.1 KiB
C++
49 lines
1.1 KiB
C++
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//
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// Created by jedi on 18.11.21.
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//
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#include "log.h"
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#include <espressif/esp_common.h>
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constexpr unsigned syslog_buffer_size = 1024;
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char syslog_buf[syslog_buffer_size];
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volatile unsigned head = 0;
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volatile unsigned streams = 0;
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extern "C" void syslog(const char *msg) {
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printf("syslog> %s", msg);
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while (char c = *msg++) {
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syslog_buf[head++ % syslog_buffer_size] = c;
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}
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syslog_buf[head] = 0;
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}
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unsigned syslog_current_tail() {
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if(head < syslog_buffer_size)
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return 0;
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return head + 1 - syslog_buffer_size;
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}
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unsigned syslog_data_after(unsigned local_tail) {
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if(local_tail > head)
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return 0;
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return (head % syslog_buffer_size) - (local_tail % syslog_buffer_size);
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}
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extern "C" int syslog_copy_out(char *out, int len, unsigned local_tail) {
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unsigned cnt = 0;
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while (cnt < syslog_data_after(local_tail) && cnt < len) {
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out[cnt] = syslog_buf[local_tail % syslog_buffer_size + cnt];
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cnt++;
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}
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return cnt;
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}
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extern "C" void syslog_attach() {
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streams++;
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}
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extern "C" void syslog_detach() {
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streams--;
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}
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