diff options
| author | Pieter Wuille <pieter.wuille@gmail.com> | 2013-01-28 00:07:51 +0100 |
|---|---|---|
| committer | Pieter Wuille <pieterw@google.com> | 2013-01-30 04:00:25 +0100 |
| commit | 288fdc092aff9d7e0cea159196b2e96044a786c7 (patch) | |
| tree | bed80bf762977827bf187ddd520841c037f80a59 /src/util.cpp | |
| parent | 2835080e164527ecc2db31e68d86ab8a8337c62b (diff) | |
Native versions for AllocateFileRange()
Diffstat (limited to 'src/util.cpp')
| -rw-r--r-- | src/util.cpp | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/util.cpp b/src/util.cpp index d8f05cb9fd..6ea5e1d839 100644 --- a/src/util.cpp +++ b/src/util.cpp @@ -3,6 +3,15 @@ // Distributed under the MIT/X11 software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. +#ifndef WIN32 +// for posix_fallocate +#ifdef __linux__ +#define _POSIX_C_SOURCE 200112L +#endif +#include <fcntl.h> +#include <sys/stat.h> +#endif + #include "util.h" #include "sync.h" #include "version.h" @@ -1155,6 +1164,35 @@ int GetFilesize(FILE* file) // this function tries to make a particular range of a file allocated (corresponding to disk space) // it is advisory, and the range specified in the arguments will never contain live data void AllocateFileRange(FILE *file, unsigned int offset, unsigned int length) { +#if defined(WIN32) + // Windows-specific version + HANDLE hFile = (HANDLE)_get_osfhandle(_fileno(file)); + LARGE_INTEGER nFileSize; + int64 nEndPos = (int64)offset + length; + nFileSize.u.LowPart = nEndPos & 0xFFFFFFFF; + nFileSize.u.HighPart = nEndPos >> 32; + SetFilePointerEx(hFile, nFileSize, 0, FILE_BEGIN); + SetEndOfFile(hFile); +#elif defined(MAC_OSX) + // OSX specific version + fstore_t fst; + fst.fst_flags = F_ALLOCATECONTIG; + fst.fst_posmode = F_PEOFPOSMODE; + fst.fst_offset = 0; + fst.fst_length = (off_t)offset + length; + fst.fst_bytesalloc = 0; + if (fcntl(fileno(file), F_PREALLOCATE, &fst) == -1) { + fst.fst_flags = F_ALLOCATEALL; + fcntl(fileno(file), F_PREALLOCATE, &fst); + } + ftruncate(fileno(file), fst.fst_length); +#elif defined(__linux__) + // Version using posix_fallocate + off_t nEndPos = (off_t)offset + length; + posix_fallocate(fileno(file), 0, nEndPos); +#else + // Fallback version + // TODO: just write one byte per block static const char buf[65536] = {}; fseek(file, offset, SEEK_SET); while (length > 0) { @@ -1164,6 +1202,7 @@ void AllocateFileRange(FILE *file, unsigned int offset, unsigned int length) { fwrite(buf, 1, now, file); // allowed to fail; this function is advisory anyway length -= now; } +#endif } void ShrinkDebugFile() |