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e16c60d9f9
git/compat/mingw.h
Marius Storm-Olsen e16c60d9f9 MinGW readdir reimplementation to support d_type 
The original readdir implementation was fast, but didn't
support the d_type. This means that git would do additional
lstats for each entry, to figure out if the entry was a
directory or not. This unneedingly slowed down many
operations, since Windows API provides this information
directly when walking the directories.

By running this implementation on Moe's repo structure:
  mkdir bummer && cd bummer; for ((i=0;i<100;i++)); do
    mkdir $i && pushd $i;
      for ((j=0;j<1000;j++)); do echo "$j" >$j; done;
    popd;
  done

We see the following speedups:
  git add .
  -------------------
  old: 00:00:23(.087)
  new: 00:00:21(.512) 1.07x

  git status
  -------------------
  old: 00:00:03(.306)
  new: 00:00:01(.684) 1.96x

  git clean -dxf
  -------------------
  old: 00:00:01(.918)
  new: 00:00:00(.295) 6.50x

Signed-off-by: Marius Storm-Olsen <marius@trolltech.com>
Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-06-01 00:25:54 -07:00

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