mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-19 06:01:57 +00:00
94 lines
2.0 KiB
C++
94 lines
2.0 KiB
C++
#include <fcntl.h>
|
|
|
|
#include <IO/ReadBufferFromFile.h>
|
|
#include <IO/WriteHelpers.h>
|
|
#include <Common/ProfileEvents.h>
|
|
#include <errno.h>
|
|
|
|
|
|
namespace ProfileEvents
|
|
{
|
|
extern const Event FileOpen;
|
|
extern const Event FileOpenFailed;
|
|
}
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int FILE_DOESNT_EXIST;
|
|
extern const int CANNOT_OPEN_FILE;
|
|
extern const int CANNOT_CLOSE_FILE;
|
|
}
|
|
|
|
|
|
ReadBufferFromFile::ReadBufferFromFile(
|
|
const std::string & file_name_,
|
|
size_t buf_size,
|
|
int flags,
|
|
char * existing_memory,
|
|
size_t alignment)
|
|
: ReadBufferFromFileDescriptor(-1, buf_size, existing_memory, alignment), file_name(file_name_)
|
|
{
|
|
ProfileEvents::increment(ProfileEvents::FileOpen);
|
|
|
|
#ifdef __APPLE__
|
|
bool o_direct = (flags != -1) && (flags & O_DIRECT);
|
|
if (o_direct)
|
|
flags = flags & ~O_DIRECT;
|
|
#endif
|
|
fd = open(file_name.c_str(), flags == -1 ? O_RDONLY : flags);
|
|
|
|
if (-1 == fd)
|
|
{
|
|
ProfileEvents::increment(ProfileEvents::FileOpenFailed);
|
|
throwFromErrno("Cannot open file " + file_name, errno == ENOENT ? ErrorCodes::FILE_DOESNT_EXIST : ErrorCodes::CANNOT_OPEN_FILE);
|
|
}
|
|
#ifdef __APPLE__
|
|
if (o_direct)
|
|
{
|
|
if (fcntl(fd, F_NOCACHE, 1) == -1)
|
|
{
|
|
ProfileEvents::increment(ProfileEvents::FileOpenFailed);
|
|
throwFromErrno("Cannot set F_NOCACHE on file " + file_name, ErrorCodes::CANNOT_OPEN_FILE);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
ReadBufferFromFile::ReadBufferFromFile(
|
|
int fd,
|
|
const std::string & original_file_name,
|
|
size_t buf_size,
|
|
char * existing_memory,
|
|
size_t alignment)
|
|
:
|
|
ReadBufferFromFileDescriptor(fd, buf_size, existing_memory, alignment),
|
|
file_name(original_file_name.empty() ? "(fd = " + toString(fd) + ")" : original_file_name)
|
|
{
|
|
}
|
|
|
|
|
|
ReadBufferFromFile::~ReadBufferFromFile()
|
|
{
|
|
if (fd < 0)
|
|
return;
|
|
|
|
::close(fd);
|
|
}
|
|
|
|
|
|
void ReadBufferFromFile::close()
|
|
{
|
|
if (0 != ::close(fd))
|
|
throw Exception("Cannot close file", ErrorCodes::CANNOT_CLOSE_FILE);
|
|
|
|
fd = -1;
|
|
metric_increment.destroy();
|
|
}
|
|
|
|
}
|