mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-15 02:41:59 +00:00
36 lines
604 B
C++
36 lines
604 B
C++
#pragma once
|
|
|
|
#include <cstddef>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
/** Struct containing a pipe with lazy initialization.
|
|
* Use `open` and `close` methods to manipulate pipe and `fds_rw` field to access
|
|
* pipe's file descriptors.
|
|
*/
|
|
struct LazyPipeFDs
|
|
{
|
|
int fds_rw[2] = {-1, -1};
|
|
|
|
void open();
|
|
void close();
|
|
|
|
void setNonBlocking();
|
|
void tryIncreaseSize(int desired_size);
|
|
|
|
~LazyPipeFDs();
|
|
};
|
|
|
|
|
|
/** Struct which opens new pipe on creation and closes it on destruction.
|
|
* Use `fds_rw` field to access pipe's file descriptors.
|
|
*/
|
|
struct PipeFDs : public LazyPipeFDs
|
|
{
|
|
PipeFDs();
|
|
};
|
|
|
|
}
|