folly::fileutil_detail Namespace Reference

Functions
template<class F , class... Args>
ssize_t	wrapNoInt (F f, Args...args)
void	incr (ssize_t)
void	incr (ssize_t n, off_t &offset)
template<class F , class... Offset>
ssize_t	wrapFull (F f, int fd, void *buf, size_t count, Offset...offset)
template<class F , class... Offset>
ssize_t	wrapvFull (F f, int fd, iovec *iov, int count, Offset...offset)

Function Documentation

void folly::fileutil_detail::incr ( ssize_t  )

inline

Definition at line 42 of file FileUtilDetail.h.

Referenced by TEST(), wrapFull(), and wrapvFull().

{}

void folly::fileutil_detail::incr ( ssize_t  n, off_t &  offset  )

inline

Definition at line 43 of file FileUtilDetail.h.

                                           {
  offset += off_t(n);
}

template<class F , class... Offset>

ssize_t folly::fileutil_detail::wrapFull	(	F	f,
		int	fd,
		void *	buf,
		size_t	count,
		Offset...	offset
	)

Definition at line 53 of file FileUtilDetail.h.

References b, f, and incr().

Referenced by folly::preadFull(), folly::pwriteFull(), folly::readFull(), folly::test::TEST_F(), and folly::writeFull().

                                                                         {
  char* b = static_cast<char*>(buf);
  ssize_t totalBytes = 0;
  ssize_t r;
  do {
    r = f(fd, b, count, offset...);
    if (r == -1) {
      if (errno == EINTR) {
        continue;
      }
      return r;
    }

    totalBytes += r;
    b += r;
    count -= r;
    incr(r, offset...);
  } while (r != 0 && count); // 0 means EOF

  return totalBytes;
}

template<class F , class... Args>

ssize_t folly::fileutil_detail::wrapNoInt	(	F	f,
		Args...	args
	)

Definition at line 34 of file FileUtilDetail.h.

References f.

Referenced by folly::dup2NoInt(), folly::dupNoInt(), folly::fdatasyncNoInt(), folly::flockNoInt(), folly::fsyncNoInt(), folly::ftruncateNoInt(), folly::openNoInt(), folly::preadNoInt(), folly::pwriteNoInt(), folly::readNoInt(), folly::readvNoInt(), folly::shutdownNoInt(), folly::truncateNoInt(), folly::writeNoInt(), and folly::writevNoInt().

                                     {
  ssize_t r;
  do {
    r = f(args...);
  } while (r == -1 && errno == EINTR);
  return r;
}

template<class F , class... Offset>

ssize_t folly::fileutil_detail::wrapvFull	(	F	f,
		int	fd,
		iovec *	iov,
		int	count,
		Offset...	offset
	)

Definition at line 78 of file FileUtilDetail.h.

References count, f, incr(), and folly::kIovMax.

Referenced by folly::preadvFull(), folly::pwritevFull(), folly::readvFull(), folly::test::TEST(), folly::test::TEST_F(), and folly::writevFull().

                                                                        {
  ssize_t totalBytes = 0;
  ssize_t r;
  do {
    r = f(fd, iov, std::min<int>(count, kIovMax), offset...);
    if (r == -1) {
      if (errno == EINTR) {
        continue;
      }
      return r;
    }

    if (r == 0) {
      break; // EOF
    }

    totalBytes += r;
    incr(r, offset...);
    while (r != 0 && count != 0) {
      if (r >= ssize_t(iov->iov_len)) {
        r -= ssize_t(iov->iov_len);
        ++iov;
        --count;
      } else {
        iov->iov_base = static_cast<char*>(iov->iov_base) + r;
        iov->iov_len -= r;
        r = 0;
      }
    }
  } while (count);

  return totalBytes;
}