thodg/libgit2/src/unix/posix.h

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• Hash : 4ce8e01a
  Author :
  Date : 2020-06-17T14:31:11
  

  Support build with NO_MMAP to disable use of system mmap * Use pread/pwrite to avoid updating position in file descriptor * Emulate missing pread/pwrite on win32 using overlapped file IO

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• src/unix/posix.h

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  #ifndef INCLUDE_unix_posix_h__
  #define INCLUDE_unix_posix_h__
  
  #ifndef LIBGIT2_NO_FEATURES_H
  # include "git2/sys/features.h"
  #endif
  
  #include <stdio.h>
  #include <dirent.h>
  #include <sys/param.h>
  #include <sys/time.h>
  #include <sys/stat.h>
  
  typedef int GIT_SOCKET;
  #define INVALID_SOCKET -1
  
  #define p_lseek(f,n,w) lseek(f, n, w)
  #define p_fstat(f,b) fstat(f, b)
  #define p_lstat(p,b) lstat(p,b)
  #define p_stat(p,b) stat(p, b)
  
  #if defined(GIT_USE_STAT_MTIMESPEC)
  # define st_atime_nsec st_atimespec.tv_nsec
  # define st_mtime_nsec st_mtimespec.tv_nsec
  # define st_ctime_nsec st_ctimespec.tv_nsec
  #elif defined(GIT_USE_STAT_MTIM)
  # define st_atime_nsec st_atim.tv_nsec
  # define st_mtime_nsec st_mtim.tv_nsec
  # define st_ctime_nsec st_ctim.tv_nsec
  #elif !defined(GIT_USE_STAT_MTIME_NSEC) && defined(GIT_USE_NSEC)
  # error GIT_USE_NSEC defined but unknown struct stat nanosecond type
  #endif
  
  #define p_utimes(f, t) utimes(f, t)
  
  #define p_readlink(a, b, c) readlink(a, b, c)
  #define p_symlink(o,n) symlink(o, n)
  #define p_link(o,n) link(o, n)
  #define p_unlink(p) unlink(p)
  #define p_mkdir(p,m) mkdir(p, m)
  extern char *p_realpath(const char *, char *);
  
  GIT_INLINE(int) p_fsync(int fd)
  {
  	p_fsync__cnt++;
  	return fsync(fd);
  }
  
  #define p_recv(s,b,l,f) recv(s,b,l,f)
  #define p_send(s,b,l,f) send(s,b,l,f)
  #define p_inet_pton(a, b, c) inet_pton(a, b, c)
  
  #define p_strcasecmp(s1, s2) strcasecmp(s1, s2)
  #define p_strncasecmp(s1, s2, c) strncasecmp(s1, s2, c)
  #define p_vsnprintf(b, c, f, a) vsnprintf(b, c, f, a)
  #define p_snprintf snprintf
  #define p_mkstemp(p) mkstemp(p)
  #define p_chdir(p) chdir(p)
  #define p_rmdir(p) rmdir(p)
  #define p_access(p,m) access(p,m)
  #define p_ftruncate(fd, sz) ftruncate(fd, sz)
  
  /*
   * Pre-Android 5 did not implement a virtual filesystem atop FAT
   * partitions for Unix permissions, which causes chmod to fail. However,
   * Unix permissions have no effect on Android anyway as file permissions
   * are not actually managed this way, so treating it as a no-op across
   * all Android is safe.
   */
  #ifdef __ANDROID__
  # define p_chmod(p,m) 0
  #else
  # define p_chmod(p,m) chmod(p, m)
  #endif
  
  /* see win32/posix.h for explanation about why this exists */
  #define p_lstat_posixly(p,b) lstat(p,b)
  
  #define p_localtime_r(c, r) localtime_r(c, r)
  #define p_gmtime_r(c, r) gmtime_r(c, r)
  
  #define p_timeval timeval
  
  #ifdef GIT_USE_FUTIMENS
  GIT_INLINE(int) p_futimes(int f, const struct p_timeval t[2])
  {
  	struct timespec s[2];
  	s[0].tv_sec = t[0].tv_sec;
  	s[0].tv_nsec = t[0].tv_usec * 1000;
  	s[1].tv_sec = t[1].tv_sec;
  	s[1].tv_nsec = t[1].tv_usec * 1000;
  	return futimens(f, s);
  }
  #else
  # define p_futimes futimes
  #endif
  
  #define p_pread(f, d, s, o) pread(f, d, s, o)
  #define p_pwrite(f, d, s, o) pwrite(f, d, s, o)
  
  #endif
  

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