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#ifndef IO_HH
#define IO_HH
#include <stddef.h>
namespace io {
class pipe {
public:
pipe();
pipe(pipe&& pipe);
~pipe();
pipe& operator=(pipe&& pipe) {
reset();
swap(pipe);
return *this;
}
bool open();
explicit operator bool() const {
return read() != -1;
}
void reset();
void swap(pipe& pipe);
int read() const {
return fd_[0];
}
int write() const {
return fd_[1];
}
private:
pipe(pipe const&) = delete;
pipe& operator=(pipe const&) = delete;
int fd_[2];
};
class unique_fd {
public:
unique_fd();
explicit unique_fd(int fd);
unique_fd(unique_fd&& fd);
~unique_fd();
unique_fd& operator=(unique_fd&& fd) {
reset();
swap(fd);
return *this;
}
int get() const {
return fd_;
}
explicit operator bool() const {
return get() != -1;
}
void reset();
void reset(int fd);
void swap(unique_fd& fd);
int release();
private:
unique_fd(unique_fd const& fd) = delete;
unique_fd& operator=(unique_fd const& fd) = delete;
int fd_;
};
bool read(pipe const& pipe, void* dst, size_t max, size_t* got = nullptr);
bool write(pipe const& pipe, void const* src, size_t size,
size_t* wrote = nullptr);
bool read(unique_fd const& fd, void* dst, size_t max, size_t* got = nullptr);
bool write(unique_fd const& fd, void const* src, size_t size,
size_t* wrote = nullptr);
} // namespace
#endif // IO_HH
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