1 |
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1.1 |
#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <signal.h> |
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#include <sched.h> |
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#include <endian.h> |
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#include <pthread.h> |
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#include <sys/syscall.h> |
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typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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1.4 |
#if __ia64 |
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# define STACKSIZE 65536 |
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1.1 |
#else |
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1.4 |
# define STACKSIZE 4096 |
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1.1 |
#endif |
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enum { |
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REQ_QUIT, |
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REQ_OPEN, REQ_CLOSE, |
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REQ_READ, REQ_WRITE, REQ_READAHEAD, |
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REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, |
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REQ_FSYNC, REQ_FDATASYNC, |
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}; |
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typedef struct aio_cb { |
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1.3 |
struct aio_cb *volatile next; |
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1.1 |
|
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int type; |
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int fd; |
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off_t offset; |
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size_t length; |
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ssize_t result; |
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mode_t mode; /* open */ |
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int errorno; |
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SV *data, *callback; |
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void *dataptr; |
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STRLEN dataoffset; |
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Stat_t *statdata; |
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} aio_cb; |
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typedef aio_cb *aio_req; |
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static int started; |
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static int nreqs; |
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1.4 |
static int max_outstanding = 1<<30; |
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1.3 |
static int respipe [2]; |
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1.1 |
|
59 |
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1.3 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
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static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
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static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
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static volatile aio_req reqs, reqe; /* queue start, queue end */ |
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static volatile aio_req ress, rese; /* queue start, queue end */ |
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1.1 |
|
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static void |
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poll_wait () |
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{ |
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1.3 |
if (!nreqs) |
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return; |
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1.1 |
fd_set rfd; |
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FD_ZERO(&rfd); |
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1.3 |
FD_SET(respipe [0], &rfd); |
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1.1 |
|
76 |
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1.3 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
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1.1 |
} |
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static int |
80 |
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1.5 |
poll_cb () |
81 |
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1.1 |
{ |
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dSP; |
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int count = 0; |
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aio_req req; |
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1.3 |
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{ |
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/* read and signals sent by the worker threads */ |
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char buf [32]; |
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while (read (respipe [0], buf, 32) > 0) |
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; |
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} |
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1.1 |
|
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1.3 |
for (;;) |
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1.1 |
{ |
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1.3 |
pthread_mutex_lock (&reslock); |
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req = ress; |
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if (ress) |
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{ |
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ress = ress->next; |
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if (!ress) rese = 0; |
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} |
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pthread_mutex_unlock (&reslock); |
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if (!req) |
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break; |
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1.1 |
nreqs--; |
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if (req->type == REQ_QUIT) |
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started--; |
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else |
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{ |
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int errorno = errno; |
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errno = req->errorno; |
118 |
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if (req->type == REQ_READ) |
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SvCUR_set (req->data, req->dataoffset |
121 |
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+ req->result > 0 ? req->result : 0); |
122 |
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if (req->data) |
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SvREFCNT_dec (req->data); |
125 |
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126 |
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if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
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{ |
128 |
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PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
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PL_laststatval = req->result; |
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PL_statcache = *(req->statdata); |
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Safefree (req->statdata); |
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} |
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PUSHMARK (SP); |
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XPUSHs (sv_2mortal (newSViv (req->result))); |
137 |
root |
1.2 |
|
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if (req->type == REQ_OPEN) |
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{ |
140 |
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/* convert fd to fh */ |
141 |
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SV *fh; |
142 |
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143 |
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PUTBACK; |
144 |
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call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
145 |
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SPAGAIN; |
146 |
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147 |
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fh = POPs; |
148 |
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149 |
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PUSHMARK (SP); |
150 |
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XPUSHs (fh); |
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} |
152 |
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153 |
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1.1 |
PUTBACK; |
154 |
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1.2 |
call_sv (req->callback, G_VOID | G_EVAL); |
155 |
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1.1 |
SPAGAIN; |
156 |
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157 |
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if (req->callback) |
158 |
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SvREFCNT_dec (req->callback); |
159 |
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160 |
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errno = errorno; |
161 |
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count++; |
162 |
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} |
163 |
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164 |
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Safefree (req); |
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} |
166 |
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167 |
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return count; |
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} |
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root |
1.4 |
static void *aio_proc(void *arg); |
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172 |
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static void |
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start_thread (void) |
174 |
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{ |
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sigset_t fullsigset, oldsigset; |
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pthread_t tid; |
177 |
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pthread_attr_t attr; |
178 |
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179 |
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pthread_attr_init (&attr); |
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pthread_attr_setstacksize (&attr, STACKSIZE); |
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pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
182 |
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183 |
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sigfillset (&fullsigset); |
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sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
185 |
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186 |
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if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
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started++; |
188 |
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189 |
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sigprocmask (SIG_SETMASK, &oldsigset, 0); |
190 |
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} |
191 |
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192 |
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static void |
193 |
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send_req (aio_req req) |
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{ |
195 |
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nreqs++; |
196 |
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197 |
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pthread_mutex_lock (&reqlock); |
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req->next = 0; |
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201 |
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if (reqe) |
202 |
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{ |
203 |
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reqe->next = req; |
204 |
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reqe = req; |
205 |
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} |
206 |
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else |
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reqe = reqs = req; |
208 |
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209 |
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pthread_cond_signal (&reqwait); |
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pthread_mutex_unlock (&reqlock); |
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212 |
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while (nreqs > max_outstanding) |
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{ |
214 |
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poll_wait (); |
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poll_cb (); |
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} |
217 |
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} |
218 |
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219 |
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static void |
220 |
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end_thread (void) |
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{ |
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aio_req req; |
223 |
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New (0, req, 1, aio_cb); |
224 |
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req->type = REQ_QUIT; |
225 |
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226 |
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send_req (req); |
227 |
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} |
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229 |
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static void |
230 |
root |
1.5 |
read_write (int dowrite, int fd, off_t offset, size_t length, |
231 |
root |
1.4 |
SV *data, STRLEN dataoffset, SV *callback) |
232 |
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{ |
233 |
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aio_req req; |
234 |
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STRLEN svlen; |
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char *svptr = SvPV (data, svlen); |
236 |
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237 |
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SvUPGRADE (data, SVt_PV); |
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SvPOK_on (data); |
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240 |
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if (dataoffset < 0) |
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dataoffset += svlen; |
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243 |
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if (dataoffset < 0 || dataoffset > svlen) |
244 |
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croak ("data offset outside of string"); |
245 |
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246 |
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if (dowrite) |
247 |
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{ |
248 |
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/* write: check length and adjust. */ |
249 |
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if (length < 0 || length + dataoffset > svlen) |
250 |
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length = svlen - dataoffset; |
251 |
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} |
252 |
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else |
253 |
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{ |
254 |
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/* read: grow scalar as necessary */ |
255 |
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svptr = SvGROW (data, length + dataoffset); |
256 |
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} |
257 |
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258 |
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if (length < 0) |
259 |
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croak ("length must not be negative"); |
260 |
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261 |
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Newz (0, req, 1, aio_cb); |
262 |
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263 |
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if (!req) |
264 |
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croak ("out of memory during aio_req allocation"); |
265 |
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266 |
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req->type = dowrite ? REQ_WRITE : REQ_READ; |
267 |
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req->fd = fd; |
268 |
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req->offset = offset; |
269 |
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req->length = length; |
270 |
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req->data = SvREFCNT_inc (data); |
271 |
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req->dataptr = (char *)svptr + dataoffset; |
272 |
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req->callback = SvREFCNT_inc (callback); |
273 |
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274 |
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send_req (req); |
275 |
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} |
276 |
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277 |
root |
1.1 |
static void * |
278 |
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aio_proc (void *thr_arg) |
279 |
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{ |
280 |
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aio_req req; |
281 |
root |
1.3 |
int type; |
282 |
root |
1.1 |
|
283 |
root |
1.3 |
do |
284 |
root |
1.1 |
{ |
285 |
root |
1.3 |
pthread_mutex_lock (&reqlock); |
286 |
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287 |
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for (;;) |
288 |
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{ |
289 |
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req = reqs; |
290 |
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291 |
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if (reqs) |
292 |
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{ |
293 |
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reqs = reqs->next; |
294 |
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if (!reqs) reqe = 0; |
295 |
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} |
296 |
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297 |
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if (req) |
298 |
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break; |
299 |
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300 |
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pthread_cond_wait (&reqwait, &reqlock); |
301 |
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} |
302 |
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303 |
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pthread_mutex_unlock (&reqlock); |
304 |
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305 |
root |
1.1 |
errno = 0; /* strictly unnecessary */ |
306 |
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307 |
root |
1.3 |
type = req->type; |
308 |
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309 |
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switch (type) |
310 |
root |
1.1 |
{ |
311 |
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case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; |
312 |
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case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; |
313 |
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#if SYS_readahead |
314 |
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case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
315 |
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#else |
316 |
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case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; |
317 |
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#endif |
318 |
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319 |
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case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
320 |
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case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
321 |
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case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
322 |
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323 |
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case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
324 |
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case REQ_CLOSE: req->result = close (req->fd); break; |
325 |
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case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
326 |
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327 |
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case REQ_FSYNC: req->result = fsync (req->fd); break; |
328 |
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case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
329 |
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330 |
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case REQ_QUIT: |
331 |
root |
1.3 |
break; |
332 |
root |
1.1 |
|
333 |
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default: |
334 |
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req->result = ENOSYS; |
335 |
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break; |
336 |
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} |
337 |
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338 |
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req->errorno = errno; |
339 |
root |
1.3 |
|
340 |
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pthread_mutex_lock (&reslock); |
341 |
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342 |
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req->next = 0; |
343 |
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344 |
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if (rese) |
345 |
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{ |
346 |
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rese->next = req; |
347 |
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rese = req; |
348 |
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} |
349 |
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else |
350 |
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{ |
351 |
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rese = ress = req; |
352 |
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353 |
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/* write a dummy byte to the pipe so fh becomes ready */ |
354 |
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write (respipe [1], &respipe, 1); |
355 |
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} |
356 |
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357 |
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pthread_mutex_unlock (&reslock); |
358 |
root |
1.1 |
} |
359 |
root |
1.3 |
while (type != REQ_QUIT); |
360 |
root |
1.1 |
|
361 |
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return 0; |
362 |
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} |
363 |
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364 |
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MODULE = IO::AIO PACKAGE = IO::AIO |
365 |
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366 |
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BOOT: |
367 |
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{ |
368 |
root |
1.3 |
if (pipe (respipe)) |
369 |
|
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croak ("unable to initialize result pipe"); |
370 |
root |
1.1 |
|
371 |
root |
1.3 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
372 |
root |
1.1 |
croak ("cannot set result pipe to nonblocking mode"); |
373 |
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|
374 |
root |
1.3 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
375 |
root |
1.1 |
croak ("cannot set result pipe to nonblocking mode"); |
376 |
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} |
377 |
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|
378 |
|
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void |
379 |
|
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min_parallel(nthreads) |
380 |
|
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int nthreads |
381 |
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PROTOTYPE: $ |
382 |
|
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CODE: |
383 |
|
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while (nthreads > started) |
384 |
|
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start_thread (); |
385 |
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|
386 |
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void |
387 |
|
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max_parallel(nthreads) |
388 |
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int nthreads |
389 |
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PROTOTYPE: $ |
390 |
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CODE: |
391 |
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{ |
392 |
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int cur = started; |
393 |
|
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while (cur > nthreads) |
394 |
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{ |
395 |
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end_thread (); |
396 |
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cur--; |
397 |
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} |
398 |
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|
399 |
|
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while (started > nthreads) |
400 |
|
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{ |
401 |
|
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poll_wait (); |
402 |
root |
1.5 |
poll_cb (); |
403 |
root |
1.1 |
} |
404 |
|
|
} |
405 |
|
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|
406 |
root |
1.4 |
int |
407 |
|
|
max_outstanding(nreqs) |
408 |
|
|
int nreqs |
409 |
|
|
PROTOTYPE: $ |
410 |
|
|
CODE: |
411 |
|
|
RETVAL = max_outstanding; |
412 |
|
|
max_outstanding = nreqs; |
413 |
|
|
|
414 |
root |
1.1 |
void |
415 |
|
|
aio_open(pathname,flags,mode,callback) |
416 |
|
|
SV * pathname |
417 |
|
|
int flags |
418 |
|
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int mode |
419 |
|
|
SV * callback |
420 |
|
|
PROTOTYPE: $$$$ |
421 |
|
|
CODE: |
422 |
|
|
{ |
423 |
|
|
aio_req req; |
424 |
|
|
|
425 |
|
|
Newz (0, req, 1, aio_cb); |
426 |
|
|
|
427 |
|
|
if (!req) |
428 |
|
|
croak ("out of memory during aio_req allocation"); |
429 |
|
|
|
430 |
|
|
req->type = REQ_OPEN; |
431 |
|
|
req->data = newSVsv (pathname); |
432 |
|
|
req->dataptr = SvPV_nolen (req->data); |
433 |
|
|
req->fd = flags; |
434 |
|
|
req->mode = mode; |
435 |
|
|
req->callback = SvREFCNT_inc (callback); |
436 |
|
|
|
437 |
|
|
send_req (req); |
438 |
|
|
} |
439 |
|
|
|
440 |
|
|
void |
441 |
|
|
aio_close(fh,callback) |
442 |
|
|
InputStream fh |
443 |
|
|
SV * callback |
444 |
|
|
PROTOTYPE: $$ |
445 |
|
|
ALIAS: |
446 |
|
|
aio_close = REQ_CLOSE |
447 |
|
|
aio_fsync = REQ_FSYNC |
448 |
|
|
aio_fdatasync = REQ_FDATASYNC |
449 |
|
|
CODE: |
450 |
|
|
{ |
451 |
|
|
aio_req req; |
452 |
|
|
|
453 |
|
|
Newz (0, req, 1, aio_cb); |
454 |
|
|
|
455 |
|
|
if (!req) |
456 |
|
|
croak ("out of memory during aio_req allocation"); |
457 |
|
|
|
458 |
|
|
req->type = ix; |
459 |
|
|
req->fd = PerlIO_fileno (fh); |
460 |
|
|
req->callback = SvREFCNT_inc (callback); |
461 |
|
|
|
462 |
|
|
send_req (req); |
463 |
|
|
} |
464 |
|
|
|
465 |
|
|
void |
466 |
|
|
aio_read(fh,offset,length,data,dataoffset,callback) |
467 |
|
|
InputStream fh |
468 |
|
|
UV offset |
469 |
|
|
IV length |
470 |
|
|
SV * data |
471 |
|
|
IV dataoffset |
472 |
|
|
SV * callback |
473 |
|
|
PROTOTYPE: $$$$$$ |
474 |
|
|
CODE: |
475 |
root |
1.5 |
read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
476 |
root |
1.1 |
|
477 |
|
|
void |
478 |
|
|
aio_write(fh,offset,length,data,dataoffset,callback) |
479 |
|
|
OutputStream fh |
480 |
|
|
UV offset |
481 |
|
|
IV length |
482 |
|
|
SV * data |
483 |
|
|
IV dataoffset |
484 |
|
|
SV * callback |
485 |
|
|
PROTOTYPE: $$$$$$ |
486 |
|
|
CODE: |
487 |
root |
1.5 |
read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
488 |
root |
1.1 |
|
489 |
|
|
void |
490 |
|
|
aio_readahead(fh,offset,length,callback) |
491 |
|
|
InputStream fh |
492 |
|
|
UV offset |
493 |
|
|
IV length |
494 |
|
|
SV * callback |
495 |
|
|
PROTOTYPE: $$$$ |
496 |
|
|
CODE: |
497 |
|
|
{ |
498 |
|
|
aio_req req; |
499 |
|
|
|
500 |
|
|
if (length < 0) |
501 |
|
|
croak ("length must not be negative"); |
502 |
|
|
|
503 |
|
|
Newz (0, req, 1, aio_cb); |
504 |
|
|
|
505 |
|
|
if (!req) |
506 |
|
|
croak ("out of memory during aio_req allocation"); |
507 |
|
|
|
508 |
|
|
req->type = REQ_READAHEAD; |
509 |
|
|
req->fd = PerlIO_fileno (fh); |
510 |
|
|
req->offset = offset; |
511 |
|
|
req->length = length; |
512 |
|
|
req->callback = SvREFCNT_inc (callback); |
513 |
|
|
|
514 |
|
|
send_req (req); |
515 |
|
|
} |
516 |
|
|
|
517 |
|
|
void |
518 |
|
|
aio_stat(fh_or_path,callback) |
519 |
|
|
SV * fh_or_path |
520 |
|
|
SV * callback |
521 |
|
|
PROTOTYPE: $$ |
522 |
|
|
ALIAS: |
523 |
|
|
aio_lstat = 1 |
524 |
|
|
CODE: |
525 |
|
|
{ |
526 |
|
|
aio_req req; |
527 |
|
|
|
528 |
|
|
Newz (0, req, 1, aio_cb); |
529 |
|
|
|
530 |
|
|
if (!req) |
531 |
|
|
croak ("out of memory during aio_req allocation"); |
532 |
|
|
|
533 |
|
|
New (0, req->statdata, 1, Stat_t); |
534 |
|
|
|
535 |
|
|
if (!req->statdata) |
536 |
|
|
croak ("out of memory during aio_req->statdata allocation"); |
537 |
|
|
|
538 |
|
|
if (SvPOK (fh_or_path)) |
539 |
|
|
{ |
540 |
|
|
req->type = ix ? REQ_LSTAT : REQ_STAT; |
541 |
|
|
req->data = newSVsv (fh_or_path); |
542 |
|
|
req->dataptr = SvPV_nolen (req->data); |
543 |
|
|
} |
544 |
|
|
else |
545 |
|
|
{ |
546 |
|
|
req->type = REQ_FSTAT; |
547 |
|
|
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
548 |
|
|
} |
549 |
|
|
|
550 |
|
|
req->callback = SvREFCNT_inc (callback); |
551 |
|
|
|
552 |
|
|
send_req (req); |
553 |
|
|
} |
554 |
|
|
|
555 |
|
|
void |
556 |
|
|
aio_unlink(pathname,callback) |
557 |
|
|
SV * pathname |
558 |
|
|
SV * callback |
559 |
|
|
PROTOTYPE: $$ |
560 |
|
|
CODE: |
561 |
|
|
{ |
562 |
|
|
aio_req req; |
563 |
|
|
|
564 |
|
|
Newz (0, req, 1, aio_cb); |
565 |
|
|
|
566 |
|
|
if (!req) |
567 |
|
|
croak ("out of memory during aio_req allocation"); |
568 |
|
|
|
569 |
|
|
req->type = REQ_UNLINK; |
570 |
|
|
req->data = newSVsv (pathname); |
571 |
|
|
req->dataptr = SvPV_nolen (req->data); |
572 |
|
|
req->callback = SvREFCNT_inc (callback); |
573 |
|
|
|
574 |
|
|
send_req (req); |
575 |
|
|
} |
576 |
|
|
|
577 |
root |
1.6 |
void |
578 |
|
|
flush() |
579 |
|
|
PROTOTYPE: |
580 |
|
|
CODE: |
581 |
|
|
while (nreqs) |
582 |
|
|
{ |
583 |
|
|
poll_wait (); |
584 |
|
|
poll_cb (); |
585 |
|
|
} |
586 |
|
|
|
587 |
root |
1.1 |
int |
588 |
|
|
poll_fileno() |
589 |
|
|
PROTOTYPE: |
590 |
|
|
CODE: |
591 |
root |
1.3 |
RETVAL = respipe [0]; |
592 |
root |
1.1 |
OUTPUT: |
593 |
|
|
RETVAL |
594 |
|
|
|
595 |
|
|
int |
596 |
|
|
poll_cb(...) |
597 |
|
|
PROTOTYPE: |
598 |
|
|
CODE: |
599 |
root |
1.5 |
RETVAL = poll_cb (); |
600 |
root |
1.1 |
OUTPUT: |
601 |
|
|
RETVAL |
602 |
|
|
|
603 |
|
|
void |
604 |
|
|
poll_wait() |
605 |
|
|
PROTOTYPE: |
606 |
|
|
CODE: |
607 |
root |
1.3 |
if (nreqs) |
608 |
|
|
poll_wait (); |
609 |
root |
1.1 |
|
610 |
|
|
int |
611 |
|
|
nreqs() |
612 |
|
|
PROTOTYPE: |
613 |
|
|
CODE: |
614 |
|
|
RETVAL = nreqs; |
615 |
|
|
OUTPUT: |
616 |
|
|
RETVAL |
617 |
|
|
|