1 |
root |
1.17 |
#define PERL_NO_GET_CONTEXT |
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3 |
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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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1.13 |
#include <sys/stat.h> |
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1.1 |
#include <unistd.h> |
10 |
root |
1.5 |
#include <fcntl.h> |
11 |
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1.8 |
#include <signal.h> |
12 |
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1.1 |
#include <sched.h> |
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14 |
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1.13 |
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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1.12 |
typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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18 |
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1.16 |
#ifndef __NR_pread64 |
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# define __NR_pread64 __NR_pread |
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#endif |
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#ifndef __NR_pwrite64 |
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# define __NR_pwrite64 __NR_pwrite |
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#endif |
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25 |
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1.8 |
#define STACKSIZE 1024 /* yeah */ |
26 |
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1.1 |
|
27 |
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1.13 |
enum { REQ_QUIT, REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, REQ_STAT, REQ_LSTAT, REQ_FSTAT}; |
28 |
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1.1 |
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29 |
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typedef struct { |
30 |
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char stack[STACKSIZE]; |
31 |
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} aio_thread; |
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33 |
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1.18 |
typedef struct aio_cb { |
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struct aio_cb *next; |
35 |
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36 |
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1.1 |
int type; |
37 |
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aio_thread *thread; |
38 |
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39 |
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int fd; |
40 |
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off_t offset; |
41 |
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size_t length; |
42 |
root |
1.2 |
ssize_t result; |
43 |
root |
1.8 |
mode_t mode; /* open */ |
44 |
root |
1.1 |
int errorno; |
45 |
root |
1.5 |
SV *data, *callback; |
46 |
root |
1.1 |
void *dataptr; |
47 |
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1.2 |
STRLEN dataoffset; |
48 |
root |
1.13 |
|
49 |
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struct stat64 *statdata; |
50 |
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1.1 |
} aio_cb; |
51 |
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52 |
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typedef aio_cb *aio_req; |
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54 |
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static int started; |
55 |
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1.5 |
static int nreqs; |
56 |
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1.1 |
static int reqpipe[2], respipe[2]; |
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58 |
root |
1.18 |
static aio_req qs, qe; /* queue start, queue end */ |
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60 |
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1.2 |
static int aio_proc(void *arg); |
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62 |
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1.1 |
static void |
63 |
root |
1.18 |
start_thread (void) |
64 |
root |
1.1 |
{ |
65 |
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1.2 |
aio_thread *thr; |
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67 |
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New (0, thr, 1, aio_thread); |
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69 |
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if (clone (aio_proc, |
70 |
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&(thr->stack[STACKSIZE]), |
71 |
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CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND, |
72 |
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thr) >= 0) |
73 |
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started++; |
74 |
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else |
75 |
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Safefree (thr); |
76 |
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1.1 |
} |
77 |
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78 |
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static void |
79 |
root |
1.18 |
send_reqs (void) |
80 |
root |
1.1 |
{ |
81 |
root |
1.18 |
/* this write is atomic */ |
82 |
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while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) |
83 |
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{ |
84 |
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qs = qs->next; |
85 |
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if (!qs) qe = 0; |
86 |
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} |
87 |
root |
1.2 |
} |
88 |
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89 |
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static void |
90 |
root |
1.8 |
send_req (aio_req req) |
91 |
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{ |
92 |
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nreqs++; |
93 |
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1.18 |
req->next = 0; |
94 |
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95 |
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if (qe) |
96 |
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qe->next = req; |
97 |
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else |
98 |
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qe = qs = req; |
99 |
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100 |
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send_reqs (); |
101 |
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} |
102 |
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103 |
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static void |
104 |
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end_thread (void) |
105 |
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{ |
106 |
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aio_req req; |
107 |
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New (0, req, 1, aio_cb); |
108 |
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req->type = REQ_QUIT; |
109 |
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110 |
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send_req (req); |
111 |
root |
1.8 |
} |
112 |
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113 |
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static void |
114 |
root |
1.17 |
read_write (pTHX_ |
115 |
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int dowrite, int fd, off_t offset, size_t length, |
116 |
root |
1.18 |
SV *data, STRLEN dataoffset, SV *callback) |
117 |
root |
1.2 |
{ |
118 |
root |
1.5 |
aio_req req; |
119 |
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STRLEN svlen; |
120 |
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char *svptr = SvPV (data, svlen); |
121 |
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122 |
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1.13 |
SvUPGRADE (data, SVt_PV); |
123 |
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SvPOK_on (data); |
124 |
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125 |
root |
1.5 |
if (dataoffset < 0) |
126 |
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dataoffset += svlen; |
127 |
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128 |
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if (dataoffset < 0 || dataoffset > svlen) |
129 |
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croak ("data offset outside of string"); |
130 |
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131 |
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if (dowrite) |
132 |
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{ |
133 |
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/* write: check length and adjust. */ |
134 |
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if (length < 0 || length + dataoffset > svlen) |
135 |
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length = svlen - dataoffset; |
136 |
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} |
137 |
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else |
138 |
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{ |
139 |
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/* read: grow scalar as necessary */ |
140 |
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svptr = SvGROW (data, length + dataoffset); |
141 |
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} |
142 |
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143 |
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if (length < 0) |
144 |
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croak ("length must not be negative"); |
145 |
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146 |
root |
1.14 |
Newz (0, req, 1, aio_cb); |
147 |
root |
1.5 |
|
148 |
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if (!req) |
149 |
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croak ("out of memory during aio_req allocation"); |
150 |
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151 |
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req->type = dowrite ? REQ_WRITE : REQ_READ; |
152 |
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req->fd = fd; |
153 |
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req->offset = offset; |
154 |
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req->length = length; |
155 |
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req->data = SvREFCNT_inc (data); |
156 |
root |
1.6 |
req->dataptr = (char *)svptr + dataoffset; |
157 |
root |
1.5 |
req->callback = SvREFCNT_inc (callback); |
158 |
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159 |
root |
1.8 |
send_req (req); |
160 |
root |
1.5 |
} |
161 |
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162 |
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static int |
163 |
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poll_cb (pTHX) |
164 |
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{ |
165 |
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dSP; |
166 |
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int count = 0; |
167 |
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aio_req req; |
168 |
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169 |
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while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
170 |
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{ |
171 |
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if (req->type == REQ_QUIT) |
172 |
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{ |
173 |
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Safefree (req->thread); |
174 |
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started--; |
175 |
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} |
176 |
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else |
177 |
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{ |
178 |
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int errorno = errno; |
179 |
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errno = req->errorno; |
180 |
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181 |
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if (req->type == REQ_READ) |
182 |
root |
1.6 |
SvCUR_set (req->data, req->dataoffset |
183 |
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+ req->result > 0 ? req->result : 0); |
184 |
root |
1.5 |
|
185 |
root |
1.14 |
if (req->data) |
186 |
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SvREFCNT_dec (req->data); |
187 |
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188 |
root |
1.13 |
if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
189 |
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{ |
190 |
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PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
191 |
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PL_laststatval = req->result; |
192 |
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PL_statcache.st_dev = req->statdata->st_dev; |
193 |
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PL_statcache.st_ino = req->statdata->st_ino; |
194 |
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PL_statcache.st_mode = req->statdata->st_mode; |
195 |
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PL_statcache.st_nlink = req->statdata->st_nlink; |
196 |
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PL_statcache.st_uid = req->statdata->st_uid; |
197 |
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PL_statcache.st_gid = req->statdata->st_gid; |
198 |
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PL_statcache.st_rdev = req->statdata->st_rdev; |
199 |
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PL_statcache.st_size = req->statdata->st_size; |
200 |
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PL_statcache.st_atime = req->statdata->st_atime; |
201 |
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PL_statcache.st_mtime = req->statdata->st_mtime; |
202 |
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PL_statcache.st_ctime = req->statdata->st_ctime; |
203 |
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PL_statcache.st_blksize = req->statdata->st_blksize; |
204 |
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PL_statcache.st_blocks = req->statdata->st_blocks; |
205 |
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206 |
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Safefree (req->statdata); |
207 |
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} |
208 |
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209 |
root |
1.5 |
PUSHMARK (SP); |
210 |
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XPUSHs (sv_2mortal (newSViv (req->result))); |
211 |
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PUTBACK; |
212 |
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call_sv (req->callback, G_VOID); |
213 |
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SPAGAIN; |
214 |
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215 |
root |
1.14 |
if (req->callback) |
216 |
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SvREFCNT_dec (req->callback); |
217 |
root |
1.5 |
|
218 |
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errno = errorno; |
219 |
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nreqs--; |
220 |
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count++; |
221 |
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} |
222 |
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223 |
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Safefree (req); |
224 |
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} |
225 |
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226 |
root |
1.18 |
if (qs) |
227 |
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{ |
228 |
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printf ("outstanding %p %d\n", qs, nreqs); |
229 |
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send_reqs (); |
230 |
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} |
231 |
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232 |
root |
1.5 |
return count; |
233 |
root |
1.2 |
} |
234 |
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235 |
root |
1.8 |
static sigset_t fullsigset; |
236 |
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237 |
root |
1.2 |
#undef errno |
238 |
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#include <asm/unistd.h> |
239 |
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240 |
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static int |
241 |
root |
1.18 |
aio_proc (void *thr_arg) |
242 |
root |
1.2 |
{ |
243 |
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aio_thread *thr = thr_arg; |
244 |
root |
1.9 |
aio_req req; |
245 |
root |
1.2 |
int errno; |
246 |
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247 |
root |
1.15 |
/* this is very much x86 and kernel-specific :(:(:( */ |
248 |
root |
1.11 |
/* we rely on gcc's ability to create closures. */ |
249 |
root |
1.13 |
_syscall3(int,read,int,fd,char *,buf,size_t,count) |
250 |
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_syscall3(int,write,int,fd,char *,buf,size_t,count) |
251 |
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252 |
root |
1.11 |
_syscall3(int,open,char *,pathname,int,flags,mode_t,mode) |
253 |
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_syscall1(int,close,int,fd) |
254 |
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255 |
root |
1.16 |
_syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
256 |
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_syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
257 |
root |
1.13 |
|
258 |
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_syscall2(int,stat64, const char *, filename, struct stat64 *, buf) |
259 |
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_syscall2(int,lstat64, const char *, filename, struct stat64 *, buf) |
260 |
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_syscall2(int,fstat64, int, fd, struct stat64 *, buf) |
261 |
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262 |
root |
1.8 |
sigprocmask (SIG_SETMASK, &fullsigset, 0); |
263 |
root |
1.2 |
|
264 |
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/* then loop */ |
265 |
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while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
266 |
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{ |
267 |
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req->thread = thr; |
268 |
root |
1.14 |
errno = 0; /* strictly unnecessary */ |
269 |
root |
1.2 |
|
270 |
root |
1.18 |
switch (req->type) |
271 |
root |
1.2 |
{ |
272 |
root |
1.18 |
case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break; |
273 |
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case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break; |
274 |
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case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
275 |
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case REQ_CLOSE: req->result = close (req->fd); break; |
276 |
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case REQ_STAT: req->result = stat64 (req->dataptr, req->statdata); break; |
277 |
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case REQ_LSTAT: req->result = lstat64 (req->dataptr, req->statdata); break; |
278 |
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case REQ_FSTAT: req->result = fstat64 (req->fd, req->statdata); break; |
279 |
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280 |
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case REQ_QUIT: |
281 |
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default: |
282 |
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write (respipe[1], (void *)&req, sizeof (req)); |
283 |
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return 0; |
284 |
root |
1.2 |
} |
285 |
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286 |
root |
1.8 |
req->errorno = errno; |
287 |
root |
1.2 |
write (respipe[1], (void *)&req, sizeof (req)); |
288 |
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} |
289 |
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290 |
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return 0; |
291 |
root |
1.1 |
} |
292 |
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293 |
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MODULE = Linux::AIO PACKAGE = Linux::AIO |
294 |
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295 |
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BOOT: |
296 |
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{ |
297 |
root |
1.8 |
sigfillset (&fullsigset); |
298 |
root |
1.9 |
sigdelset (&fullsigset, SIGTERM); |
299 |
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sigdelset (&fullsigset, SIGQUIT); |
300 |
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sigdelset (&fullsigset, SIGABRT); |
301 |
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sigdelset (&fullsigset, SIGINT); |
302 |
root |
1.8 |
|
303 |
root |
1.1 |
if (pipe (reqpipe) || pipe (respipe)) |
304 |
|
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croak ("unable to initialize request or result pipe"); |
305 |
root |
1.18 |
|
306 |
|
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if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) |
307 |
|
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croak ("cannot set result pipe to nonblocking mode"); |
308 |
root |
1.5 |
|
309 |
|
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if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) |
310 |
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croak ("cannot set result pipe to nonblocking mode"); |
311 |
root |
1.1 |
} |
312 |
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313 |
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void |
314 |
|
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min_parallel(nthreads) |
315 |
|
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int nthreads |
316 |
root |
1.5 |
PROTOTYPE: $ |
317 |
root |
1.1 |
CODE: |
318 |
|
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while (nthreads > started) |
319 |
|
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start_thread (); |
320 |
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|
321 |
|
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void |
322 |
|
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max_parallel(nthreads) |
323 |
|
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int nthreads |
324 |
root |
1.5 |
PROTOTYPE: $ |
325 |
root |
1.1 |
CODE: |
326 |
root |
1.5 |
int cur = started; |
327 |
|
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while (cur > nthreads) |
328 |
|
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{ |
329 |
|
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end_thread (); |
330 |
|
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cur--; |
331 |
|
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} |
332 |
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|
333 |
root |
1.1 |
while (started > nthreads) |
334 |
root |
1.5 |
{ |
335 |
root |
1.14 |
fd_set rfd; |
336 |
|
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FD_ZERO(&rfd); |
337 |
|
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FD_SET(respipe[0], &rfd); |
338 |
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|
339 |
|
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select (respipe[0] + 1, &rfd, 0, 0, 0); |
340 |
root |
1.17 |
poll_cb (aTHX); |
341 |
root |
1.5 |
} |
342 |
root |
1.1 |
|
343 |
|
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void |
344 |
root |
1.8 |
aio_open(pathname,flags,mode,callback) |
345 |
root |
1.13 |
SV * pathname |
346 |
root |
1.8 |
int flags |
347 |
|
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int mode |
348 |
|
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SV * callback |
349 |
|
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PROTOTYPE: $$$$ |
350 |
|
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CODE: |
351 |
|
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aio_req req; |
352 |
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|
353 |
root |
1.14 |
Newz (0, req, 1, aio_cb); |
354 |
root |
1.8 |
|
355 |
|
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if (!req) |
356 |
|
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croak ("out of memory during aio_req allocation"); |
357 |
|
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|
358 |
|
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req->type = REQ_OPEN; |
359 |
root |
1.14 |
req->data = newSVsv (pathname); |
360 |
|
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req->dataptr = SvPV_nolen (req->data); |
361 |
root |
1.8 |
req->fd = flags; |
362 |
|
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req->mode = mode; |
363 |
root |
1.10 |
req->callback = SvREFCNT_inc (callback); |
364 |
|
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|
365 |
|
|
send_req (req); |
366 |
|
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|
367 |
|
|
void |
368 |
|
|
aio_close(fh,callback) |
369 |
root |
1.13 |
InputStream fh |
370 |
root |
1.10 |
SV * callback |
371 |
root |
1.14 |
PROTOTYPE: $$ |
372 |
root |
1.10 |
CODE: |
373 |
|
|
aio_req req; |
374 |
|
|
|
375 |
root |
1.14 |
Newz (0, req, 1, aio_cb); |
376 |
root |
1.10 |
|
377 |
|
|
if (!req) |
378 |
|
|
croak ("out of memory during aio_req allocation"); |
379 |
|
|
|
380 |
|
|
req->type = REQ_CLOSE; |
381 |
|
|
req->fd = PerlIO_fileno (fh); |
382 |
root |
1.13 |
req->callback = SvREFCNT_inc (callback); |
383 |
|
|
|
384 |
|
|
send_req (req); |
385 |
|
|
|
386 |
|
|
void |
387 |
|
|
aio_read(fh,offset,length,data,dataoffset,callback) |
388 |
|
|
InputStream fh |
389 |
|
|
UV offset |
390 |
|
|
IV length |
391 |
|
|
SV * data |
392 |
|
|
IV dataoffset |
393 |
|
|
SV * callback |
394 |
|
|
PROTOTYPE: $$$$$$ |
395 |
|
|
CODE: |
396 |
|
|
read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
397 |
|
|
|
398 |
|
|
void |
399 |
|
|
aio_write(fh,offset,length,data,dataoffset,callback) |
400 |
|
|
OutputStream fh |
401 |
|
|
UV offset |
402 |
|
|
IV length |
403 |
|
|
SV * data |
404 |
|
|
IV dataoffset |
405 |
|
|
SV * callback |
406 |
|
|
PROTOTYPE: $$$$$$ |
407 |
|
|
CODE: |
408 |
|
|
read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
409 |
|
|
|
410 |
|
|
void |
411 |
|
|
aio_stat(fh_or_path,callback) |
412 |
|
|
SV * fh_or_path |
413 |
|
|
SV * callback |
414 |
|
|
PROTOTYPE: $$ |
415 |
|
|
ALIAS: |
416 |
|
|
aio_lstat = 1 |
417 |
|
|
CODE: |
418 |
|
|
aio_req req; |
419 |
|
|
|
420 |
root |
1.14 |
Newz (0, req, 1, aio_cb); |
421 |
root |
1.13 |
|
422 |
|
|
if (!req) |
423 |
|
|
croak ("out of memory during aio_req allocation"); |
424 |
|
|
|
425 |
|
|
New (0, req->statdata, 1, struct stat64); |
426 |
|
|
|
427 |
|
|
if (!req->statdata) |
428 |
|
|
croak ("out of memory during aio_req->statdata allocation"); |
429 |
|
|
|
430 |
|
|
if (SvPOK (fh_or_path)) |
431 |
|
|
{ |
432 |
|
|
req->type = ix ? REQ_LSTAT : REQ_STAT; |
433 |
root |
1.14 |
req->data = newSVsv (fh_or_path); |
434 |
|
|
req->dataptr = SvPV_nolen (req->data); |
435 |
root |
1.13 |
} |
436 |
|
|
else |
437 |
|
|
{ |
438 |
|
|
req->type = REQ_FSTAT; |
439 |
|
|
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
440 |
|
|
} |
441 |
|
|
|
442 |
root |
1.8 |
req->callback = SvREFCNT_inc (callback); |
443 |
|
|
|
444 |
|
|
send_req (req); |
445 |
root |
1.5 |
|
446 |
|
|
int |
447 |
|
|
poll_fileno() |
448 |
|
|
PROTOTYPE: |
449 |
|
|
CODE: |
450 |
|
|
RETVAL = respipe[0]; |
451 |
|
|
OUTPUT: |
452 |
|
|
RETVAL |
453 |
|
|
|
454 |
|
|
int |
455 |
root |
1.6 |
poll_cb(...) |
456 |
root |
1.5 |
PROTOTYPE: |
457 |
|
|
CODE: |
458 |
|
|
RETVAL = poll_cb (aTHX); |
459 |
|
|
OUTPUT: |
460 |
|
|
RETVAL |
461 |
|
|
|
462 |
|
|
int |
463 |
|
|
nreqs() |
464 |
|
|
PROTOTYPE: |
465 |
|
|
CODE: |
466 |
|
|
RETVAL = nreqs; |
467 |
|
|
OUTPUT: |
468 |
|
|
RETVAL |
469 |
|
|
|