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| author |  Janos Laube <janos.dev@gmail.com> | 2009-03-13 16:50:45 +0100 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2009-03-18 19:23:04 -0700 |
| commit | b130a72b274441bb5d687de93efef4d990c40c0a (patch) | |
| tree | 094a2c29c15061b4124cde258dd6de3be8f254eb /Makefile | |
| parent | gc --aggressive: make it really aggressive (diff) | |
| download | tgif-b130a72b274441bb5d687de93efef4d990c40c0a.tar.xz | |
MinGW: implement mmap
Add USE_WIN32_MMAP which triggers the use of windows' native
file memory mapping functionality in git_mmap()/git_munmap() functions.
As git functions currently use mmap with MAP_PRIVATE set only, this
implementation supports only that mode for now.
On Windows, offsets for memory mapped files need to match the allocation
granularity. Take this into account when calculating the packed git-
windowsize and file offsets. At the moment, the only function which makes
use of offsets in conjunction with mmap is use_pack() in sha1-file.c.
Git fast-import's code path tries to map a portion of the temporary
packfile that exceeds the current filesize, i.e. offset+length is
greater than the filesize. The NO_MMAP code worked with that since pread()
just reads the file content until EOF and returns gracefully, while
MapViewOfFile() aborts the mapping and returns 'Access Denied'.
Working around that by determining the filesize and adjusting the length
parameter.
Signed-off-by: Janos Laube <janos.dev@gmail.com>
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 7 |
1 files changed, 6 insertions, 1 deletions
@@ -784,7 +784,6 @@ ifneq (,$(findstring CYGWIN,$(uname_S))) COMPAT_OBJS += compat/cygwin.o endif ifneq (,$(findstring MINGW,$(uname_S))) - NO_MMAP = YesPlease NO_PREAD = YesPlease NO_OPENSSL = YesPlease NO_CURL = YesPlease @@ -808,6 +807,7 @@ ifneq (,$(findstring MINGW,$(uname_S))) NO_POSIX_ONLY_PROGRAMS = YesPlease NO_ST_BLOCKS_IN_STRUCT_STAT = YesPlease NO_NSEC = YesPlease + USE_WIN32_MMAP = YesPlease COMPAT_CFLAGS += -D__USE_MINGW_ACCESS -DNOGDI -Icompat -Icompat/regex -Icompat/fnmatch COMPAT_CFLAGS += -DSNPRINTF_SIZE_CORR=1 COMPAT_CFLAGS += -DSTRIP_EXTENSION=\".exe\" @@ -985,6 +985,11 @@ endif ifdef NO_MMAP COMPAT_CFLAGS += -DNO_MMAP COMPAT_OBJS += compat/mmap.o +else + ifdef USE_WIN32_MMAP + COMPAT_CFLAGS += -DUSE_WIN32_MMAP + COMPAT_OBJS += compat/win32mmap.o + endif endif ifdef NO_PREAD COMPAT_CFLAGS += -DNO_PREAD |