static int log_print_header(LogContext *pContext)
{
int result;
if ((result=log_file_lock(pContext->log_fd)) != 0)
{
return result;
}
pContext->current_size = lseek(pContext->log_fd, 0, SEEK_END);
if (pContext->current_size < 0)
{
result = errno != 0 ? errno : EACCES;
log_file_unlock(pContext->log_fd);
fprintf(stderr, "lseek file \"%s\" fail, " \
"errno: %d, error info: %s\n", \
pContext->log_filename, result, STRERROR(result));
return result;
}
if (pContext->current_size == 0)
{
pContext->print_header_callback(pContext);
}
log_file_unlock(pContext->log_fd);
return 0;
}
void my_lock_trace(FILE *stream, const char *func, const unsigned int line, char *fmt, ...)
{
log_file_lock();
fprintf(g_stream, "%s(%d):", func, line);
va_list ap;
va_start(ap, fmt);
vfprintf(g_stream, fmt, ap);
va_end(ap);
fprintf(g_stream, "\n");
fflush(g_stream);
log_file_unlock();
}