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![Janos Laube](/assets/img/avatar_default.png)
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>
236 lines
5.6 KiB
C
236 lines
5.6 KiB
C
#include <winsock2.h>
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/*
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* things that are not available in header files
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*/
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typedef int pid_t;
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#define hstrerror strerror
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#define S_IFLNK 0120000 /* Symbolic link */
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#define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
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#define S_ISSOCK(x) 0
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#define S_IRGRP 0
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#define S_IWGRP 0
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#define S_IXGRP 0
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#define S_ISGID 0
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#define S_IROTH 0
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#define S_IXOTH 0
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#define WIFEXITED(x) ((unsigned)(x) < 259) /* STILL_ACTIVE */
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#define WEXITSTATUS(x) ((x) & 0xff)
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#define WIFSIGNALED(x) ((unsigned)(x) > 259)
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#define SIGHUP 1
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#define SIGQUIT 3
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#define SIGKILL 9
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#define SIGPIPE 13
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#define SIGALRM 14
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#define SIGCHLD 17
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#define F_GETFD 1
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#define F_SETFD 2
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#define FD_CLOEXEC 0x1
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struct passwd {
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char *pw_name;
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char *pw_gecos;
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char *pw_dir;
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};
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struct pollfd {
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int fd; /* file descriptor */
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short events; /* requested events */
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short revents; /* returned events */
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};
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#define POLLIN 1
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#define POLLHUP 2
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typedef void (__cdecl *sig_handler_t)(int);
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struct sigaction {
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sig_handler_t sa_handler;
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unsigned sa_flags;
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};
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#define sigemptyset(x) (void)0
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#define SA_RESTART 0
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struct itimerval {
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struct timeval it_value, it_interval;
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};
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#define ITIMER_REAL 0
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/*
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* trivial stubs
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*/
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static inline int readlink(const char *path, char *buf, size_t bufsiz)
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{ errno = ENOSYS; return -1; }
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static inline int symlink(const char *oldpath, const char *newpath)
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{ errno = ENOSYS; return -1; }
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static inline int fchmod(int fildes, mode_t mode)
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{ errno = ENOSYS; return -1; }
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static inline int fork(void)
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{ errno = ENOSYS; return -1; }
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static inline unsigned int alarm(unsigned int seconds)
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{ return 0; }
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static inline int fsync(int fd)
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{ return 0; }
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static inline int getppid(void)
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{ return 1; }
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static inline void sync(void)
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{}
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static inline int getuid()
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{ return 1; }
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static inline struct passwd *getpwnam(const char *name)
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{ return NULL; }
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static inline int fcntl(int fd, int cmd, long arg)
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{
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if (cmd == F_GETFD || cmd == F_SETFD)
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return 0;
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errno = EINVAL;
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return -1;
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}
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/*
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* simple adaptors
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*/
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static inline int mingw_mkdir(const char *path, int mode)
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{
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return mkdir(path);
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}
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#define mkdir mingw_mkdir
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static inline int mingw_unlink(const char *pathname)
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{
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/* read-only files cannot be removed */
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chmod(pathname, 0666);
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return unlink(pathname);
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}
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#define unlink mingw_unlink
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static inline int waitpid(pid_t pid, unsigned *status, unsigned options)
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{
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if (options == 0)
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return _cwait(status, pid, 0);
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errno = EINVAL;
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return -1;
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}
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/*
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* implementations of missing functions
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*/
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int pipe(int filedes[2]);
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unsigned int sleep (unsigned int seconds);
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int mkstemp(char *template);
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int gettimeofday(struct timeval *tv, void *tz);
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int poll(struct pollfd *ufds, unsigned int nfds, int timeout);
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struct tm *gmtime_r(const time_t *timep, struct tm *result);
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struct tm *localtime_r(const time_t *timep, struct tm *result);
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int getpagesize(void); /* defined in MinGW's libgcc.a */
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struct passwd *getpwuid(int uid);
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int setitimer(int type, struct itimerval *in, struct itimerval *out);
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int sigaction(int sig, struct sigaction *in, struct sigaction *out);
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int link(const char *oldpath, const char *newpath);
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/*
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* replacements of existing functions
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*/
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int mingw_open (const char *filename, int oflags, ...);
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#define open mingw_open
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char *mingw_getcwd(char *pointer, int len);
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#define getcwd mingw_getcwd
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char *mingw_getenv(const char *name);
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#define getenv mingw_getenv
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struct hostent *mingw_gethostbyname(const char *host);
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#define gethostbyname mingw_gethostbyname
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int mingw_socket(int domain, int type, int protocol);
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#define socket mingw_socket
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int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
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#define connect mingw_connect
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int mingw_rename(const char*, const char*);
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#define rename mingw_rename
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#ifdef USE_WIN32_MMAP
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int mingw_getpagesize(void);
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#define getpagesize mingw_getpagesize
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#endif
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/* Use mingw_lstat() instead of lstat()/stat() and
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* mingw_fstat() instead of fstat() on Windows.
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*/
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#define off_t off64_t
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#define stat _stati64
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#define lseek _lseeki64
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int mingw_lstat(const char *file_name, struct stat *buf);
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int mingw_fstat(int fd, struct stat *buf);
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#define fstat mingw_fstat
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#define lstat mingw_lstat
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#define _stati64(x,y) mingw_lstat(x,y)
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int mingw_utime(const char *file_name, const struct utimbuf *times);
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#define utime mingw_utime
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pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env);
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void mingw_execvp(const char *cmd, char *const *argv);
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#define execvp mingw_execvp
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static inline unsigned int git_ntohl(unsigned int x)
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{ return (unsigned int)ntohl(x); }
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#define ntohl git_ntohl
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sig_handler_t mingw_signal(int sig, sig_handler_t handler);
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#define signal mingw_signal
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/*
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* ANSI emulation wrappers
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*/
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int winansi_fputs(const char *str, FILE *stream);
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int winansi_printf(const char *format, ...) __attribute__((format (printf, 1, 2)));
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int winansi_fprintf(FILE *stream, const char *format, ...) __attribute__((format (printf, 2, 3)));
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#define fputs winansi_fputs
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#define printf(...) winansi_printf(__VA_ARGS__)
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#define fprintf(...) winansi_fprintf(__VA_ARGS__)
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/*
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* git specific compatibility
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*/
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#define has_dos_drive_prefix(path) (isalpha(*(path)) && (path)[1] == ':')
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#define is_dir_sep(c) ((c) == '/' || (c) == '\\')
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#define PATH_SEP ';'
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#define PRIuMAX "I64u"
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void mingw_open_html(const char *path);
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#define open_html mingw_open_html
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/*
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* helpers
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*/
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char **copy_environ(void);
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void free_environ(char **env);
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char **env_setenv(char **env, const char *name);
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/*
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* A replacement of main() that ensures that argv[0] has a path
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*/
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#define main(c,v) dummy_decl_mingw_main(); \
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static int mingw_main(); \
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int main(int argc, const char **argv) \
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{ \
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argv[0] = xstrdup(_pgmptr); \
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return mingw_main(argc, argv); \
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} \
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static int mingw_main(c,v)
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