ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libeio/eio.c
(Generate patch)

Comparing libeio/eio.c (file contents):
Revision 1.120 by root, Tue Apr 24 18:47:50 2012 UTC vs.
Revision 1.122 by root, Tue Aug 14 04:15:35 2012 UTC

… …
132 #define sync() EIO_ENOSYS () 132 #define sync() EIO_ENOSYS ()
133 #define readlink(path,buf,s) EIO_ENOSYS () 133 #define readlink(path,buf,s) EIO_ENOSYS ()
134 #define statvfs(path,buf) EIO_ENOSYS () 134 #define statvfs(path,buf) EIO_ENOSYS ()
135 #define fstatvfs(fd,buf) EIO_ENOSYS () 135 #define fstatvfs(fd,buf) EIO_ENOSYS ()
136 136
137 #define pread(fd,buf,count,offset) eio__pread (fd, buf, count, offset)
138 #define pwrite(fd,buf,count,offset) eio__pwrite (fd, buf, count, offset)
139
140 #if __GNUC__
141 typedef long long eio_off_t; /* signed for compatibility to msvc */
142 #else
143 typedef __int64 eio_off_t; /* unsigned not supported by msvc */
144 #endif
145
146 static eio_ssize_t
147 eio__pread (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
148 {
149 OVERLAPPED o = { 0 };
150 DWORD got;
151
152 o.Offset = offset;
153 o.OffsetHigh = offset >> 32;
154
155 return ReadFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
156 ? got : -1;
157 }
158
159 static eio_ssize_t
160 eio__pwrite (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
161 {
162 OVERLAPPED o = { 0 };
163 DWORD got;
164
165 o.Offset = offset;
166 o.OffsetHigh = offset >> 32;
167
168 return WriteFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
169 ? got : -1;
170 }
171
137 /* rename() uses MoveFile, which fails to overwrite */ 172 /* rename() uses MoveFile, which fails to overwrite */
138 #define rename(old,neu) eio__rename (old, neu) 173 #define rename(old,neu) eio__rename (old, neu)
139 174
140 static int 175 static int
141 eio__rename (const char *old, const char *neu) 176 eio__rename (const char *old, const char *neu)
… …
379static xmutex_t wrklock; 414static xmutex_t wrklock;
380static xmutex_t reslock; 415static xmutex_t reslock;
381static xmutex_t reqlock; 416static xmutex_t reqlock;
382static xcond_t reqwait; 417static xcond_t reqwait;
383 418
384#if !HAVE_PREADWRITE
385/*
386 * make our pread/pwrite emulation safe against themselves, but not against
387 * normal read/write by using a mutex. slows down execution a lot,
388 * but that's your problem, not mine.
389 */
390static xmutex_t preadwritelock;
391#endif
392
393typedef struct etp_worker 419typedef struct etp_worker
394{ 420{
395 struct tmpbuf tmpbuf; 421 struct tmpbuf tmpbuf;
396 422
397 /* locked by wrklock */ 423 /* locked by wrklock */
… …
942 return etp_poll (); 968 return etp_poll ();
943} 969}
944 970
945/*****************************************************************************/ 971/*****************************************************************************/
946/* work around various missing functions */ 972/* work around various missing functions */
947
948#if !HAVE_PREADWRITE
949# undef pread
950# undef pwrite
951# define pread eio__pread
952# define pwrite eio__pwrite
953
954static eio_ssize_t
955eio__pread (int fd, void *buf, size_t count, off_t offset)
956{
957 eio_ssize_t res;
958 off_t ooffset;
959
960 X_LOCK (preadwritelock);
961 ooffset = lseek (fd, 0, SEEK_CUR);
962 lseek (fd, offset, SEEK_SET);
963 res = read (fd, buf, count);
964 lseek (fd, ooffset, SEEK_SET);
965 X_UNLOCK (preadwritelock);
966
967 return res;
968}
969
970static eio_ssize_t
971eio__pwrite (int fd, void *buf, size_t count, off_t offset)
972{
973 eio_ssize_t res;
974 off_t ooffset;
975
976 X_LOCK (preadwritelock);
977 ooffset = lseek (fd, 0, SEEK_CUR);
978 lseek (fd, offset, SEEK_SET);
979 res = write (fd, buf, count);
980 lseek (fd, ooffset, SEEK_SET);
981 X_UNLOCK (preadwritelock);
982
983 return res;
984}
985#endif
986 973
987#ifndef HAVE_UTIMES 974#ifndef HAVE_UTIMES
988 975
989# undef utimes 976# undef utimes
990# define utimes(path,times) eio__utimes (path, times) 977# define utimes(path,times) eio__utimes (path, times)
… …
2240 free (req); 2227 free (req);
2241 2228
2242 X_LOCK (wrklock); 2229 X_LOCK (wrklock);
2243 etp_worker_free (self); 2230 etp_worker_free (self);
2244 X_UNLOCK (wrklock); 2231 X_UNLOCK (wrklock);
2232
2233 return 0;
2245} 2234}
2246 2235
2247/*****************************************************************************/ 2236/*****************************************************************************/
2248 2237
2249int ecb_cold 2238int ecb_cold
2250eio_init (void (*want_poll)(void), void (*done_poll)(void)) 2239eio_init (void (*want_poll)(void), void (*done_poll)(void))
2251{ 2240{
2252#if !HAVE_PREADWRITE
2253 X_MUTEX_CREATE (preadwritelock);
2254#endif
2255
2256 return etp_init (want_poll, done_poll); 2241 return etp_init (want_poll, done_poll);
2257} 2242}
2258 2243
2259ecb_inline void 2244ecb_inline void
2260eio_api_destroy (eio_req *req) 2245eio_api_destroy (eio_req *req)
2261{ 2246{
2262 free (req); 2247 free (req);
2263} 2248}
2264 2249
2265#define REQ(rtype) \ 2250#define REQ(rtype) \
2266 eio_req *req; \ 2251 eio_req *req; \
2267 \ 2252 \
2268 req = (eio_req *)calloc (1, sizeof *req); \ 2253 req = (eio_req *)calloc (1, sizeof *req); \
2269 if (!req) \ 2254 if (!req) \
2270 return 0; \ 2255 return 0; \

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines