diff options
Diffstat (limited to 'sal/osl/unx/file.cxx')
| -rw-r--r-- | sal/osl/unx/file.cxx | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/sal/osl/unx/file.cxx b/sal/osl/unx/file.cxx index 1f04802aa9e6..0ee0b8887dd4 100644 --- a/sal/osl/unx/file.cxx +++ b/sal/osl/unx/file.cxx @@ -36,6 +36,7 @@ #include "unixerrnostring.hxx" #include <algorithm> +#include <atomic> #include <cassert> #include <limits> @@ -84,7 +85,8 @@ struct FileHandle_Impl sal_uInt64 m_size; /*< file size */ off_t m_offset; /*< physical offset from begin of file */ - off_t m_fileptr; /*< logical offset from begin of file */ + // m_fileptr is hit hard in some situations, where the overhead of a mutex starts to show up, so use an atomic + std::atomic<off_t> m_fileptr; /*< logical offset from begin of file */ off_t m_bufptr; /*< buffer offset from begin of file */ size_t m_buflen; /*< buffer filled [0, m_bufsiz - 1] */ @@ -224,7 +226,7 @@ size_t FileHandle_Impl::getpagesize() sal_uInt64 FileHandle_Impl::getPos() const { - return sal::static_int_cast< sal_uInt64 >(m_fileptr); + return sal::static_int_cast< sal_uInt64 >(m_fileptr.load()); } void FileHandle_Impl::setPos(sal_uInt64 uPos) @@ -1421,7 +1423,7 @@ oslFileError SAL_CALL osl_getFilePos(oslFileHandle Handle, sal_uInt64* pPos) if ((!pImpl) || ((pImpl->m_kind == FileHandle_Impl::KIND_FD) && (pImpl->m_fd == -1)) || (!pPos)) return osl_File_E_INVAL; - FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + // no need to lock because pos is atomic *pPos = pImpl->getPos(); return osl_File_E_None; |