mirror of
https://github.com/ClickHouse/ClickHouse.git
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116 lines
2.6 KiB
C++
116 lines
2.6 KiB
C++
#include <sys/stat.h>
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#include <fcntl.h>
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#include <cerrno>
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#include <Common/ProfileEvents.h>
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#include <base/defines.h>
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#include <IO/WriteBufferFromFile.h>
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#include <IO/WriteHelpers.h>
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namespace ProfileEvents
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{
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extern const Event FileOpen;
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}
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int FILE_DOESNT_EXIST;
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extern const int CANNOT_OPEN_FILE;
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extern const int CANNOT_CLOSE_FILE;
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}
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WriteBufferFromFile::WriteBufferFromFile(
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const std::string & file_name_,
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size_t buf_size,
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int flags,
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ThrottlerPtr throttler_,
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mode_t mode,
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char * existing_memory,
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size_t alignment)
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: WriteBufferFromFileDescriptor(-1, buf_size, existing_memory, throttler_, alignment, file_name_)
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{
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ProfileEvents::increment(ProfileEvents::FileOpen);
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#ifdef OS_DARWIN
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bool o_direct = (flags != -1) && (flags & O_DIRECT);
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if (o_direct)
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flags = flags & ~O_DIRECT;
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#endif
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fd = ::open(file_name.c_str(), flags == -1 ? O_WRONLY | O_TRUNC | O_CREAT | O_CLOEXEC : flags | O_CLOEXEC, mode);
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if (-1 == fd)
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ErrnoException::throwFromPath(
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errno == ENOENT ? ErrorCodes::FILE_DOESNT_EXIST : ErrorCodes::CANNOT_OPEN_FILE, file_name, "Cannot open file {}", file_name);
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#ifdef OS_DARWIN
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if (o_direct)
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{
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if (fcntl(fd, F_NOCACHE, 1) == -1)
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ErrnoException::throwFromPath(ErrorCodes::CANNOT_OPEN_FILE, file_name, "Cannot set F_NOCACHE on file {}", file_name);
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}
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#endif
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}
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/// Use pre-opened file descriptor.
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WriteBufferFromFile::WriteBufferFromFile(
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int & fd_,
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const std::string & original_file_name,
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size_t buf_size,
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ThrottlerPtr throttler_,
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char * existing_memory,
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size_t alignment)
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: WriteBufferFromFileDescriptor(fd_, buf_size, existing_memory, throttler_, alignment, original_file_name)
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{
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fd_ = -1;
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}
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WriteBufferFromFile::~WriteBufferFromFile()
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{
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if (fd < 0)
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return;
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finalize();
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int err = ::close(fd);
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/// Everything except for EBADF should be ignored in dtor, since all of
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/// others (EINTR/EIO/ENOSPC/EDQUOT) could be possible during writing to
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/// fd, and then write already failed and the error had been reported to
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/// the user/caller.
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///
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/// Note, that for close() on Linux, EINTR should *not* be retried.
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chassert(!(err && errno == EBADF));
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}
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void WriteBufferFromFile::finalizeImpl()
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{
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if (fd < 0)
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return;
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next();
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}
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/// Close file before destruction of object.
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void WriteBufferFromFile::close()
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{
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if (fd < 0)
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return;
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finalize();
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if (0 != ::close(fd))
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throw Exception(ErrorCodes::CANNOT_CLOSE_FILE, "Cannot close file");
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fd = -1;
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metric_increment.destroy();
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}
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}
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