1 |
root |
1.1 |
#include "perl.h" |
2 |
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#include "XSUB.h" |
3 |
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4 |
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#include <sys/types.h> |
5 |
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#include <sys/stat.h> |
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root |
1.10 |
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7 |
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1.1 |
#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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1.10 |
#if __linux |
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#include <sys/syscall.h> |
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#endif |
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1.1 |
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#include <pthread.h> |
16 |
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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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21 |
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1.4 |
#if __ia64 |
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# define STACKSIZE 65536 |
23 |
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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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27 |
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enum { |
28 |
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REQ_QUIT, |
29 |
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REQ_OPEN, REQ_CLOSE, |
30 |
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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 { |
36 |
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1.3 |
struct aio_cb *volatile next; |
37 |
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1.1 |
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int type; |
39 |
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40 |
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int fd; |
41 |
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off_t offset; |
42 |
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size_t length; |
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ssize_t result; |
44 |
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mode_t mode; /* open */ |
45 |
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int errorno; |
46 |
root |
1.13 |
SV *data, *callback, *fh; |
47 |
root |
1.1 |
void *dataptr; |
48 |
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STRLEN dataoffset; |
49 |
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50 |
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Stat_t *statdata; |
51 |
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} aio_cb; |
52 |
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53 |
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typedef aio_cb *aio_req; |
54 |
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55 |
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static int started; |
56 |
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1.11 |
static volatile int nreqs; |
57 |
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1.4 |
static int max_outstanding = 1<<30; |
58 |
root |
1.3 |
static int respipe [2]; |
59 |
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1.1 |
|
60 |
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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; |
63 |
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64 |
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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 |
68 |
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poll_wait () |
69 |
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{ |
70 |
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1.11 |
if (nreqs && !ress) |
71 |
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{ |
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fd_set rfd; |
73 |
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FD_ZERO(&rfd); |
74 |
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FD_SET(respipe [0], &rfd); |
75 |
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1.3 |
|
76 |
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1.11 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
77 |
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} |
78 |
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1.1 |
} |
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80 |
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static int |
81 |
root |
1.5 |
poll_cb () |
82 |
root |
1.1 |
{ |
83 |
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dSP; |
84 |
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int count = 0; |
85 |
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1.11 |
aio_req req, prv; |
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87 |
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pthread_mutex_lock (&reslock); |
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89 |
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1.3 |
{ |
90 |
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1.11 |
/* read any signals sent by the worker threads */ |
91 |
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1.3 |
char buf [32]; |
92 |
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while (read (respipe [0], buf, 32) > 0) |
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; |
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} |
95 |
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1.1 |
|
96 |
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1.11 |
req = ress; |
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ress = rese = 0; |
98 |
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1.3 |
|
99 |
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1.11 |
pthread_mutex_unlock (&reslock); |
100 |
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1.3 |
|
101 |
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1.11 |
while (req) |
102 |
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{ |
103 |
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1.1 |
nreqs--; |
104 |
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105 |
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if (req->type == REQ_QUIT) |
106 |
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started--; |
107 |
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else |
108 |
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{ |
109 |
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int errorno = errno; |
110 |
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errno = req->errorno; |
111 |
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112 |
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if (req->type == REQ_READ) |
113 |
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SvCUR_set (req->data, req->dataoffset |
114 |
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+ req->result > 0 ? req->result : 0); |
115 |
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116 |
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if (req->data) |
117 |
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SvREFCNT_dec (req->data); |
118 |
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119 |
root |
1.13 |
if (req->fh) |
120 |
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SvREFCNT_dec (req->fh); |
121 |
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122 |
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1.1 |
if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
123 |
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{ |
124 |
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PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
125 |
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PL_laststatval = req->result; |
126 |
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PL_statcache = *(req->statdata); |
127 |
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128 |
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Safefree (req->statdata); |
129 |
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} |
130 |
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131 |
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1.13 |
ENTER; |
132 |
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1.1 |
PUSHMARK (SP); |
133 |
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XPUSHs (sv_2mortal (newSViv (req->result))); |
134 |
root |
1.2 |
|
135 |
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if (req->type == REQ_OPEN) |
136 |
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{ |
137 |
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/* convert fd to fh */ |
138 |
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SV *fh; |
139 |
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140 |
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PUTBACK; |
141 |
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call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
142 |
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SPAGAIN; |
143 |
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144 |
root |
1.13 |
fh = SvREFCNT_inc (POPs); |
145 |
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1.2 |
|
146 |
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PUSHMARK (SP); |
147 |
root |
1.13 |
XPUSHs (sv_2mortal (fh)); |
148 |
root |
1.2 |
} |
149 |
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150 |
root |
1.8 |
if (SvOK (req->callback)) |
151 |
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{ |
152 |
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PUTBACK; |
153 |
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call_sv (req->callback, G_VOID | G_EVAL); |
154 |
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SPAGAIN; |
155 |
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} |
156 |
root |
1.13 |
|
157 |
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LEAVE; |
158 |
root |
1.1 |
|
159 |
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if (req->callback) |
160 |
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SvREFCNT_dec (req->callback); |
161 |
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162 |
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errno = errorno; |
163 |
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count++; |
164 |
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} |
165 |
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166 |
root |
1.11 |
prv = req; |
167 |
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req = req->next; |
168 |
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Safefree (prv); |
169 |
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170 |
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/* TODO: croak on errors? */ |
171 |
root |
1.1 |
} |
172 |
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173 |
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return count; |
174 |
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} |
175 |
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176 |
root |
1.4 |
static void *aio_proc(void *arg); |
177 |
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178 |
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static void |
179 |
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start_thread (void) |
180 |
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{ |
181 |
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sigset_t fullsigset, oldsigset; |
182 |
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pthread_t tid; |
183 |
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pthread_attr_t attr; |
184 |
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185 |
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pthread_attr_init (&attr); |
186 |
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pthread_attr_setstacksize (&attr, STACKSIZE); |
187 |
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pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
188 |
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189 |
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sigfillset (&fullsigset); |
190 |
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sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
191 |
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192 |
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if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
193 |
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started++; |
194 |
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195 |
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sigprocmask (SIG_SETMASK, &oldsigset, 0); |
196 |
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} |
197 |
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198 |
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static void |
199 |
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send_req (aio_req req) |
200 |
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{ |
201 |
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nreqs++; |
202 |
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203 |
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pthread_mutex_lock (&reqlock); |
204 |
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205 |
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req->next = 0; |
206 |
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207 |
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if (reqe) |
208 |
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{ |
209 |
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reqe->next = req; |
210 |
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reqe = req; |
211 |
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} |
212 |
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else |
213 |
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reqe = reqs = req; |
214 |
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215 |
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pthread_cond_signal (&reqwait); |
216 |
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pthread_mutex_unlock (&reqlock); |
217 |
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218 |
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while (nreqs > max_outstanding) |
219 |
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{ |
220 |
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poll_wait (); |
221 |
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poll_cb (); |
222 |
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} |
223 |
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} |
224 |
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225 |
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static void |
226 |
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end_thread (void) |
227 |
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{ |
228 |
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aio_req req; |
229 |
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New (0, req, 1, aio_cb); |
230 |
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req->type = REQ_QUIT; |
231 |
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232 |
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send_req (req); |
233 |
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} |
234 |
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235 |
root |
1.1 |
static void * |
236 |
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aio_proc (void *thr_arg) |
237 |
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{ |
238 |
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aio_req req; |
239 |
root |
1.3 |
int type; |
240 |
root |
1.1 |
|
241 |
root |
1.3 |
do |
242 |
root |
1.1 |
{ |
243 |
root |
1.3 |
pthread_mutex_lock (&reqlock); |
244 |
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245 |
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for (;;) |
246 |
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{ |
247 |
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req = reqs; |
248 |
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249 |
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if (reqs) |
250 |
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{ |
251 |
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reqs = reqs->next; |
252 |
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if (!reqs) reqe = 0; |
253 |
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} |
254 |
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255 |
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if (req) |
256 |
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break; |
257 |
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258 |
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pthread_cond_wait (&reqwait, &reqlock); |
259 |
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} |
260 |
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261 |
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pthread_mutex_unlock (&reqlock); |
262 |
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263 |
root |
1.1 |
errno = 0; /* strictly unnecessary */ |
264 |
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265 |
root |
1.3 |
type = req->type; |
266 |
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267 |
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switch (type) |
268 |
root |
1.1 |
{ |
269 |
root |
1.10 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
270 |
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case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
271 |
root |
1.1 |
#if SYS_readahead |
272 |
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case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
273 |
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#else |
274 |
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case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; |
275 |
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#endif |
276 |
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277 |
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case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
278 |
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case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
279 |
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case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
280 |
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281 |
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case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
282 |
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case REQ_CLOSE: req->result = close (req->fd); break; |
283 |
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case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
284 |
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285 |
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case REQ_FSYNC: req->result = fsync (req->fd); break; |
286 |
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case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
287 |
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288 |
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case REQ_QUIT: |
289 |
root |
1.3 |
break; |
290 |
root |
1.1 |
|
291 |
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default: |
292 |
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req->result = ENOSYS; |
293 |
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break; |
294 |
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} |
295 |
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|
296 |
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req->errorno = errno; |
297 |
root |
1.3 |
|
298 |
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pthread_mutex_lock (&reslock); |
299 |
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|
300 |
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req->next = 0; |
301 |
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302 |
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if (rese) |
303 |
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{ |
304 |
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rese->next = req; |
305 |
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rese = req; |
306 |
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} |
307 |
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else |
308 |
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{ |
309 |
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rese = ress = req; |
310 |
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|
311 |
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/* write a dummy byte to the pipe so fh becomes ready */ |
312 |
|
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write (respipe [1], &respipe, 1); |
313 |
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} |
314 |
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315 |
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pthread_mutex_unlock (&reslock); |
316 |
root |
1.1 |
} |
317 |
root |
1.3 |
while (type != REQ_QUIT); |
318 |
root |
1.1 |
|
319 |
|
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return 0; |
320 |
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} |
321 |
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|
322 |
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MODULE = IO::AIO PACKAGE = IO::AIO |
323 |
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|
324 |
root |
1.8 |
PROTOTYPES: ENABLE |
325 |
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|
326 |
root |
1.1 |
BOOT: |
327 |
|
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{ |
328 |
root |
1.3 |
if (pipe (respipe)) |
329 |
|
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croak ("unable to initialize result pipe"); |
330 |
root |
1.1 |
|
331 |
root |
1.3 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
332 |
root |
1.1 |
croak ("cannot set result pipe to nonblocking mode"); |
333 |
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|
334 |
root |
1.3 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
335 |
root |
1.1 |
croak ("cannot set result pipe to nonblocking mode"); |
336 |
|
|
} |
337 |
|
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|
338 |
|
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void |
339 |
|
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min_parallel(nthreads) |
340 |
|
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int nthreads |
341 |
|
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PROTOTYPE: $ |
342 |
|
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CODE: |
343 |
|
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while (nthreads > started) |
344 |
|
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start_thread (); |
345 |
|
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|
346 |
|
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void |
347 |
|
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max_parallel(nthreads) |
348 |
|
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int nthreads |
349 |
|
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PROTOTYPE: $ |
350 |
|
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CODE: |
351 |
|
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{ |
352 |
|
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int cur = started; |
353 |
|
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while (cur > nthreads) |
354 |
|
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{ |
355 |
|
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end_thread (); |
356 |
|
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cur--; |
357 |
|
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} |
358 |
|
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|
359 |
|
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while (started > nthreads) |
360 |
|
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{ |
361 |
|
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poll_wait (); |
362 |
root |
1.5 |
poll_cb (); |
363 |
root |
1.1 |
} |
364 |
|
|
} |
365 |
|
|
|
366 |
root |
1.4 |
int |
367 |
|
|
max_outstanding(nreqs) |
368 |
|
|
int nreqs |
369 |
|
|
PROTOTYPE: $ |
370 |
|
|
CODE: |
371 |
|
|
RETVAL = max_outstanding; |
372 |
|
|
max_outstanding = nreqs; |
373 |
|
|
|
374 |
root |
1.1 |
void |
375 |
root |
1.8 |
aio_open(pathname,flags,mode,callback=&PL_sv_undef) |
376 |
root |
1.1 |
SV * pathname |
377 |
|
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int flags |
378 |
|
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int mode |
379 |
|
|
SV * callback |
380 |
root |
1.8 |
PROTOTYPE: $$$;$ |
381 |
root |
1.1 |
CODE: |
382 |
|
|
{ |
383 |
|
|
aio_req req; |
384 |
|
|
|
385 |
|
|
Newz (0, req, 1, aio_cb); |
386 |
|
|
|
387 |
|
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if (!req) |
388 |
|
|
croak ("out of memory during aio_req allocation"); |
389 |
|
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|
390 |
|
|
req->type = REQ_OPEN; |
391 |
|
|
req->data = newSVsv (pathname); |
392 |
|
|
req->dataptr = SvPV_nolen (req->data); |
393 |
|
|
req->fd = flags; |
394 |
|
|
req->mode = mode; |
395 |
|
|
req->callback = SvREFCNT_inc (callback); |
396 |
|
|
|
397 |
|
|
send_req (req); |
398 |
|
|
} |
399 |
|
|
|
400 |
|
|
void |
401 |
root |
1.8 |
aio_close(fh,callback=&PL_sv_undef) |
402 |
root |
1.13 |
SV * fh |
403 |
|
|
SV * callback |
404 |
root |
1.8 |
PROTOTYPE: $;$ |
405 |
root |
1.1 |
ALIAS: |
406 |
|
|
aio_close = REQ_CLOSE |
407 |
|
|
aio_fsync = REQ_FSYNC |
408 |
|
|
aio_fdatasync = REQ_FDATASYNC |
409 |
|
|
CODE: |
410 |
|
|
{ |
411 |
|
|
aio_req req; |
412 |
|
|
|
413 |
|
|
Newz (0, req, 1, aio_cb); |
414 |
|
|
|
415 |
|
|
if (!req) |
416 |
|
|
croak ("out of memory during aio_req allocation"); |
417 |
|
|
|
418 |
|
|
req->type = ix; |
419 |
root |
1.13 |
req->fh = newSVsv (fh); |
420 |
|
|
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
421 |
root |
1.1 |
req->callback = SvREFCNT_inc (callback); |
422 |
|
|
|
423 |
|
|
send_req (req); |
424 |
|
|
} |
425 |
|
|
|
426 |
|
|
void |
427 |
root |
1.8 |
aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
428 |
root |
1.13 |
SV * fh |
429 |
|
|
UV offset |
430 |
|
|
IV length |
431 |
|
|
SV * data |
432 |
|
|
IV dataoffset |
433 |
|
|
SV * callback |
434 |
|
|
ALIAS: |
435 |
|
|
aio_read = REQ_READ |
436 |
|
|
aio_write = REQ_WRITE |
437 |
root |
1.8 |
PROTOTYPE: $$$$$;$ |
438 |
root |
1.1 |
CODE: |
439 |
root |
1.13 |
{ |
440 |
|
|
aio_req req; |
441 |
|
|
STRLEN svlen; |
442 |
|
|
char *svptr = SvPV (data, svlen); |
443 |
|
|
|
444 |
|
|
SvUPGRADE (data, SVt_PV); |
445 |
|
|
SvPOK_on (data); |
446 |
root |
1.1 |
|
447 |
root |
1.13 |
if (dataoffset < 0) |
448 |
|
|
dataoffset += svlen; |
449 |
|
|
|
450 |
|
|
if (dataoffset < 0 || dataoffset > svlen) |
451 |
|
|
croak ("data offset outside of string"); |
452 |
|
|
|
453 |
|
|
if (ix == REQ_WRITE) |
454 |
|
|
{ |
455 |
|
|
/* write: check length and adjust. */ |
456 |
|
|
if (length < 0 || length + dataoffset > svlen) |
457 |
|
|
length = svlen - dataoffset; |
458 |
|
|
} |
459 |
|
|
else |
460 |
|
|
{ |
461 |
|
|
/* read: grow scalar as necessary */ |
462 |
|
|
svptr = SvGROW (data, length + dataoffset); |
463 |
|
|
} |
464 |
|
|
|
465 |
|
|
if (length < 0) |
466 |
|
|
croak ("length must not be negative"); |
467 |
|
|
|
468 |
|
|
Newz (0, req, 1, aio_cb); |
469 |
|
|
|
470 |
|
|
if (!req) |
471 |
|
|
croak ("out of memory during aio_req allocation"); |
472 |
|
|
|
473 |
|
|
req->type = ix; |
474 |
|
|
req->fh = newSVsv (fh); |
475 |
|
|
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
476 |
|
|
: IoOFP (sv_2io (fh))); |
477 |
|
|
req->offset = offset; |
478 |
|
|
req->length = length; |
479 |
|
|
req->data = SvREFCNT_inc (data); |
480 |
|
|
req->dataptr = (char *)svptr + dataoffset; |
481 |
|
|
req->callback = SvREFCNT_inc (callback); |
482 |
|
|
|
483 |
|
|
send_req (req); |
484 |
|
|
} |
485 |
root |
1.1 |
|
486 |
|
|
void |
487 |
root |
1.8 |
aio_readahead(fh,offset,length,callback=&PL_sv_undef) |
488 |
root |
1.13 |
SV * fh |
489 |
|
|
UV offset |
490 |
|
|
IV length |
491 |
|
|
SV * callback |
492 |
root |
1.8 |
PROTOTYPE: $$$;$ |
493 |
root |
1.1 |
CODE: |
494 |
|
|
{ |
495 |
|
|
aio_req req; |
496 |
|
|
|
497 |
|
|
if (length < 0) |
498 |
|
|
croak ("length must not be negative"); |
499 |
|
|
|
500 |
|
|
Newz (0, req, 1, aio_cb); |
501 |
|
|
|
502 |
|
|
if (!req) |
503 |
|
|
croak ("out of memory during aio_req allocation"); |
504 |
|
|
|
505 |
|
|
req->type = REQ_READAHEAD; |
506 |
root |
1.13 |
req->fh = newSVsv (fh); |
507 |
|
|
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
508 |
root |
1.1 |
req->offset = offset; |
509 |
|
|
req->length = length; |
510 |
|
|
req->callback = SvREFCNT_inc (callback); |
511 |
|
|
|
512 |
|
|
send_req (req); |
513 |
|
|
} |
514 |
|
|
|
515 |
|
|
void |
516 |
root |
1.8 |
aio_stat(fh_or_path,callback=&PL_sv_undef) |
517 |
root |
1.1 |
SV * fh_or_path |
518 |
|
|
SV * callback |
519 |
|
|
ALIAS: |
520 |
root |
1.8 |
aio_stat = REQ_STAT |
521 |
|
|
aio_lstat = REQ_LSTAT |
522 |
root |
1.1 |
CODE: |
523 |
|
|
{ |
524 |
|
|
aio_req req; |
525 |
|
|
|
526 |
|
|
Newz (0, req, 1, aio_cb); |
527 |
|
|
|
528 |
|
|
if (!req) |
529 |
|
|
croak ("out of memory during aio_req allocation"); |
530 |
|
|
|
531 |
|
|
New (0, req->statdata, 1, Stat_t); |
532 |
|
|
|
533 |
|
|
if (!req->statdata) |
534 |
|
|
croak ("out of memory during aio_req->statdata allocation"); |
535 |
|
|
|
536 |
|
|
if (SvPOK (fh_or_path)) |
537 |
|
|
{ |
538 |
root |
1.8 |
req->type = ix; |
539 |
root |
1.1 |
req->data = newSVsv (fh_or_path); |
540 |
|
|
req->dataptr = SvPV_nolen (req->data); |
541 |
|
|
} |
542 |
|
|
else |
543 |
|
|
{ |
544 |
|
|
req->type = REQ_FSTAT; |
545 |
root |
1.13 |
req->fh = newSVsv (fh_or_path); |
546 |
root |
1.1 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
547 |
|
|
} |
548 |
|
|
|
549 |
|
|
req->callback = SvREFCNT_inc (callback); |
550 |
|
|
|
551 |
|
|
send_req (req); |
552 |
|
|
} |
553 |
|
|
|
554 |
|
|
void |
555 |
root |
1.8 |
aio_unlink(pathname,callback=&PL_sv_undef) |
556 |
root |
1.1 |
SV * pathname |
557 |
|
|
SV * callback |
558 |
|
|
CODE: |
559 |
|
|
{ |
560 |
|
|
aio_req req; |
561 |
|
|
|
562 |
|
|
Newz (0, req, 1, aio_cb); |
563 |
|
|
|
564 |
|
|
if (!req) |
565 |
|
|
croak ("out of memory during aio_req allocation"); |
566 |
|
|
|
567 |
|
|
req->type = REQ_UNLINK; |
568 |
|
|
req->data = newSVsv (pathname); |
569 |
|
|
req->dataptr = SvPV_nolen (req->data); |
570 |
|
|
req->callback = SvREFCNT_inc (callback); |
571 |
|
|
|
572 |
|
|
send_req (req); |
573 |
|
|
} |
574 |
|
|
|
575 |
root |
1.6 |
void |
576 |
|
|
flush() |
577 |
|
|
PROTOTYPE: |
578 |
|
|
CODE: |
579 |
|
|
while (nreqs) |
580 |
|
|
{ |
581 |
|
|
poll_wait (); |
582 |
|
|
poll_cb (); |
583 |
|
|
} |
584 |
|
|
|
585 |
root |
1.7 |
void |
586 |
|
|
poll() |
587 |
|
|
PROTOTYPE: |
588 |
|
|
CODE: |
589 |
|
|
if (nreqs) |
590 |
|
|
{ |
591 |
|
|
poll_wait (); |
592 |
|
|
poll_cb (); |
593 |
|
|
} |
594 |
|
|
|
595 |
root |
1.1 |
int |
596 |
|
|
poll_fileno() |
597 |
|
|
PROTOTYPE: |
598 |
|
|
CODE: |
599 |
root |
1.3 |
RETVAL = respipe [0]; |
600 |
root |
1.1 |
OUTPUT: |
601 |
|
|
RETVAL |
602 |
|
|
|
603 |
|
|
int |
604 |
|
|
poll_cb(...) |
605 |
|
|
PROTOTYPE: |
606 |
|
|
CODE: |
607 |
root |
1.5 |
RETVAL = poll_cb (); |
608 |
root |
1.1 |
OUTPUT: |
609 |
|
|
RETVAL |
610 |
|
|
|
611 |
|
|
void |
612 |
|
|
poll_wait() |
613 |
|
|
PROTOTYPE: |
614 |
|
|
CODE: |
615 |
root |
1.3 |
if (nreqs) |
616 |
|
|
poll_wait (); |
617 |
root |
1.1 |
|
618 |
|
|
int |
619 |
|
|
nreqs() |
620 |
|
|
PROTOTYPE: |
621 |
|
|
CODE: |
622 |
|
|
RETVAL = nreqs; |
623 |
|
|
OUTPUT: |
624 |
|
|
RETVAL |
625 |
|
|
|