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/cvs/IO-AIO/AIO.xs
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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.56 by root, Mon Oct 23 14:49:51 2006 UTC vs.
Revision 1.63 by root, Mon Oct 23 23:48:31 2006 UTC

1#if __linux
2# define _GNU_SOURCE
3#endif
4
1#define _REENTRANT 1 5#define _REENTRANT 1
6
2#include <errno.h> 7#include <errno.h>
3 8
4#include "EXTERN.h" 9#include "EXTERN.h"
5#include "perl.h" 10#include "perl.h"
6#include "XSUB.h" 11#include "XSUB.h"
… …
66 71
67typedef struct aio_cb 72typedef struct aio_cb
68{ 73{
69 struct aio_cb *volatile next; 74 struct aio_cb *volatile next;
70 75
71 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73 SV *self; /* the perl counterpart of this request, if any */
74
75 SV *data, *callback; 76 SV *data, *callback;
76 SV *fh, *fh2; 77 SV *fh, *fh2;
77 void *dataptr, *data2ptr; 78 void *dataptr, *data2ptr;
78 Stat_t *statdata; 79 Stat_t *statdata;
79 off_t offset; 80 off_t offset;
80 size_t length; 81 size_t length;
81 ssize_t result; 82 ssize_t result;
82 83
84 STRLEN dataoffset;
83 int type; 85 int type;
84 int fd, fd2; 86 int fd, fd2;
85 int errorno; 87 int errorno;
86 STRLEN dataoffset;
87 mode_t mode; /* open */ 88 mode_t mode; /* open */
89
88 unsigned char cancelled; 90 unsigned char flags;
91 unsigned char pri;
92
93 SV *self; /* the perl counterpart of this request, if any */
94 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
89} aio_cb; 95} aio_cb;
96
97enum {
98 FLAG_CANCELLED = 0x01,
99};
90 100
91typedef aio_cb *aio_req; 101typedef aio_cb *aio_req;
92typedef aio_cb *aio_req_ornot; 102typedef aio_cb *aio_req_ornot;
103
104enum {
105 PRI_MIN = -4,
106 PRI_MAX = 4,
107
108 DEFAULT_PRI = 0,
109 PRI_BIAS = -PRI_MIN,
110};
111
112static int next_pri = DEFAULT_PRI + PRI_BIAS;
93 113
94static int started, wanted; 114static int started, wanted;
95static volatile int nreqs; 115static volatile int nreqs;
96static int max_outstanding = 1<<30; 116static int max_outstanding = 1<<30;
97static int respipe [2]; 117static int respipe [2];
98 118
119#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
120# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
121#else
122# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
123#endif
124
99static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 125static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 126static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 127static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102 128
103static volatile aio_req reqs, reqe; /* queue start, queue end */ 129static volatile aio_req reqs, reqe; /* queue start, queue end */
104static volatile aio_req ress, rese; /* queue start, queue end */ 130static volatile aio_req ress, rese; /* queue start, queue end */
105 131
… …
130 return mg ? (aio_req)mg->mg_ptr : 0; 156 return mg ? (aio_req)mg->mg_ptr : 0;
131} 157}
132 158
133static void aio_grp_feed (aio_req grp) 159static void aio_grp_feed (aio_req grp)
134{ 160{
135 while (grp->length < grp->fd2) 161 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
136 { 162 {
137 int old_len = grp->length; 163 int old_len = grp->length;
138 164
139 if (grp->fh2 && SvOK (grp->fh2)) 165 if (grp->fh2 && SvOK (grp->fh2))
140 { 166 {
… …
176 } 202 }
177} 203}
178 204
179static void poll_wait () 205static void poll_wait ()
180{ 206{
181 if (nreqs && !ress)
182 {
183 fd_set rfd; 207 fd_set rfd;
208
209 while (nreqs)
210 {
211 aio_req req;
212 pthread_mutex_lock (&reslock);
213 req = ress;
214 pthread_mutex_unlock (&reslock);
215
216 if (req)
217 return;
218
184 FD_ZERO(&rfd); 219 FD_ZERO(&rfd);
185 FD_SET(respipe [0], &rfd); 220 FD_SET(respipe [0], &rfd);
186 221
187 select (respipe [0] + 1, &rfd, 0, 0, 0); 222 select (respipe [0] + 1, &rfd, 0, 0, 0);
188 } 223 }
… …
191static void req_invoke (aio_req req) 226static void req_invoke (aio_req req)
192{ 227{
193 dSP; 228 dSP;
194 int errorno = errno; 229 int errorno = errno;
195 230
196 if (req->cancelled || !SvOK (req->callback)) 231 if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
197 return; 232 return;
198 233
199 errno = req->errorno; 234 errno = req->errorno;
200 235
201 ENTER; 236 ENTER;
… …
321 Safefree (req); 356 Safefree (req);
322} 357}
323 358
324static void req_cancel (aio_req req) 359static void req_cancel (aio_req req)
325{ 360{
326 req->cancelled = 1; 361 req->flags |= FLAG_CANCELLED;
327 362
328 if (req->type == REQ_GROUP) 363 if (req->type == REQ_GROUP)
329 { 364 {
330 aio_req sub; 365 aio_req sub;
331 366
… …
785 } 820 }
786 821
787 pthread_mutex_unlock (&reqlock); 822 pthread_mutex_unlock (&reqlock);
788 823
789 errno = 0; /* strictly unnecessary */ 824 errno = 0; /* strictly unnecessary */
790
791 if (!req->cancelled)
792 switch (type = req->type) /* remember type for QUIT check */ 825 type = req->type; /* remember type for QUIT check */
826
827 if (!(req->flags & FLAG_CANCELLED))
828 switch (type)
793 { 829 {
794 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 830 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
795 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 831 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
796 832
797 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 833 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
… …
916 atfork_parent (); 952 atfork_parent ();
917} 953}
918 954
919#define dREQ \ 955#define dREQ \
920 aio_req req; \ 956 aio_req req; \
957 int req_pri = next_pri; \
958 next_pri = DEFAULT_PRI + PRI_BIAS; \
921 \ 959 \
922 if (SvOK (callback) && !SvROK (callback)) \ 960 if (SvOK (callback) && !SvROK (callback)) \
923 croak ("callback must be undef or of reference type"); \ 961 croak ("callback must be undef or of reference type"); \
924 \ 962 \
925 Newz (0, req, 1, aio_cb); \ 963 Newz (0, req, 1, aio_cb); \
926 if (!req) \ 964 if (!req) \
927 croak ("out of memory during aio_req allocation"); \ 965 croak ("out of memory during aio_req allocation"); \
928 \ 966 \
929 req->callback = newSVsv (callback) 967 req->callback = newSVsv (callback); \
968 req->pri = req_pri
930 969
931#define REQ_SEND \ 970#define REQ_SEND \
932 req_send (req); \ 971 req_send (req); \
933 \ 972 \
934 if (GIMME_V != G_VOID) \ 973 if (GIMME_V != G_VOID) \
… …
1209 SV * callback 1248 SV * callback
1210 PROTOTYPE: ;$ 1249 PROTOTYPE: ;$
1211 PPCODE: 1250 PPCODE:
1212{ 1251{
1213 dREQ; 1252 dREQ;
1253
1214 req->type = REQ_GROUP; 1254 req->type = REQ_GROUP;
1215 req_send (req); 1255 req_send (req);
1256
1216 XPUSHs (req_sv (req, AIO_GRP_KLASS)); 1257 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1217} 1258}
1218 1259
1219void 1260void
1220aio_nop (callback=&PL_sv_undef) 1261aio_nop (callback=&PL_sv_undef)
… …
1225 1266
1226 req->type = REQ_NOP; 1267 req->type = REQ_NOP;
1227 1268
1228 REQ_SEND; 1269 REQ_SEND;
1229} 1270}
1271
1272#if 0
1273
1274void
1275aio_pri (int pri = DEFAULT_PRI)
1276 CODE:
1277 if (pri < PRI_MIN) pri = PRI_MIN;
1278 if (pri > PRI_MAX) pri = PRI_MAX;
1279 next_pri = pri + PRI_BIAS;
1280
1281#endif
1230 1282
1231void 1283void
1232flush () 1284flush ()
1233 PROTOTYPE: 1285 PROTOTYPE:
1234 CODE: 1286 CODE:
… …
1288 PROTOTYPE: 1340 PROTOTYPE:
1289 CODE: 1341 CODE:
1290 req_cancel (req); 1342 req_cancel (req);
1291 1343
1292void 1344void
1293cb (aio_req req, SV *callback=&PL_sv_undef) 1345cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1294 CODE: 1346 CODE:
1295 SvREFCNT_dec (req->callback); 1347 SvREFCNT_dec (req->callback);
1296 req->callback = newSVsv (callback); 1348 req->callback = newSVsv (callback);
1297 1349
1298MODULE = IO::AIO PACKAGE = IO::AIO::GRP 1350MODULE = IO::AIO PACKAGE = IO::AIO::GRP

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