From 699fc9f67a9a62df492d1cd049e4978953640de9 Mon Sep 17 00:00:00 2001 From: "Graydon, Tracy" Date: Thu, 31 Jan 2013 17:08:15 -0800 Subject: Initial commit for Tizen --- compat/win32mmap.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 compat/win32mmap.c (limited to 'compat/win32mmap.c') diff --git a/compat/win32mmap.c b/compat/win32mmap.c new file mode 100644 index 0000000..b58aa69 --- /dev/null +++ b/compat/win32mmap.c @@ -0,0 +1,41 @@ +#include "../git-compat-util.h" + +void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset) +{ + HANDLE hmap; + void *temp; + off_t len; + struct stat st; + uint64_t o = offset; + uint32_t l = o & 0xFFFFFFFF; + uint32_t h = (o >> 32) & 0xFFFFFFFF; + + if (!fstat(fd, &st)) + len = st.st_size; + else + die("mmap: could not determine filesize"); + + if ((length + offset) > len) + length = xsize_t(len - offset); + + if (!(flags & MAP_PRIVATE)) + die("Invalid usage of mmap when built with USE_WIN32_MMAP"); + + hmap = CreateFileMapping((HANDLE)_get_osfhandle(fd), 0, PAGE_WRITECOPY, + 0, 0, 0); + + if (!hmap) + return MAP_FAILED; + + temp = MapViewOfFileEx(hmap, FILE_MAP_COPY, h, l, length, start); + + if (!CloseHandle(hmap)) + warning("unable to close file mapping handle\n"); + + return temp ? temp : MAP_FAILED; +} + +int git_munmap(void *start, size_t length) +{ + return !UnmapViewOfFile(start); +} -- cgit v1.2.3