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#include "pipe.h"
#include <unistd.h>
#include <cstdlib>
#include <fcntl.h>
#include "error.h"
namespace ov4
{
void self_pipe_init()
{
int ret = pipe2(self_pipe_fd, O_NONBLOCK);
if (ret != 0)
{
throw T_error(error_code::FAIL_TO_OPEN_PIPE, "Fail to open self pipe");
}
}
/*
* write a byte to self pipe
* NB: you can ONLY determine that signal handler was called
* but CANNOT determine the number of callings, or which signal was called
* because when the pipe is full, nothing will be written
*/
int self_pipe_write()
{
return write(self_pipe_fd[1], &SELF_PIPE_BYTE, 1);
}
}
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