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root |
1.1 |
#define PERL_NO_GET_CONTEXT |
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#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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#if __i386 || __amd64 |
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# define STACKSIZE ( 256 * sizeof (long)) |
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#elif __ia64 |
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# define STACKSIZE (8192 * sizeof (long)) |
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#else |
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# define STACKSIZE ( 512 * sizeof (long)) |
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#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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root |
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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1.3 |
static int respipe [2]; |
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1.1 |
|
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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 *aio_proc(void *arg); |
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static void |
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start_thread (void) |
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{ |
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sigset_t fullsigset, oldsigset; |
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pthread_t tid; |
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pthread_attr_t attr; |
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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); |
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sigfillset (&fullsigset); |
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sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
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if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
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started++; |
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sigprocmask (SIG_SETMASK, &oldsigset, 0); |
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} |
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static void |
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send_req (aio_req req) |
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{ |
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nreqs++; |
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1.3 |
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pthread_mutex_lock (&reqlock); |
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1.1 |
req->next = 0; |
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1.3 |
if (reqe) |
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1.1 |
{ |
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1.3 |
reqe->next = req; |
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reqe = req; |
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1.1 |
} |
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else |
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1.3 |
reqe = reqs = req; |
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|
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1.3 |
pthread_cond_signal (&reqwait); |
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pthread_mutex_unlock (&reqlock); |
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1.1 |
} |
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static void |
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end_thread (void) |
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{ |
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aio_req req; |
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New (0, req, 1, aio_cb); |
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req->type = REQ_QUIT; |
118 |
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send_req (req); |
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} |
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static void |
123 |
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read_write (pTHX_ |
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int dowrite, int fd, off_t offset, size_t length, |
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SV *data, STRLEN dataoffset, SV *callback) |
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{ |
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aio_req req; |
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STRLEN svlen; |
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char *svptr = SvPV (data, svlen); |
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SvUPGRADE (data, SVt_PV); |
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SvPOK_on (data); |
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if (dataoffset < 0) |
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dataoffset += svlen; |
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if (dataoffset < 0 || dataoffset > svlen) |
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croak ("data offset outside of string"); |
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if (dowrite) |
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{ |
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/* write: check length and adjust. */ |
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if (length < 0 || length + dataoffset > svlen) |
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length = svlen - dataoffset; |
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} |
146 |
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else |
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{ |
148 |
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/* read: grow scalar as necessary */ |
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svptr = SvGROW (data, length + dataoffset); |
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} |
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152 |
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if (length < 0) |
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croak ("length must not be negative"); |
154 |
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155 |
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Newz (0, req, 1, aio_cb); |
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157 |
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if (!req) |
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croak ("out of memory during aio_req allocation"); |
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req->type = dowrite ? REQ_WRITE : REQ_READ; |
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req->fd = fd; |
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req->offset = offset; |
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req->length = length; |
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req->data = SvREFCNT_inc (data); |
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req->dataptr = (char *)svptr + dataoffset; |
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req->callback = SvREFCNT_inc (callback); |
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send_req (req); |
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} |
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static void |
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poll_wait () |
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{ |
174 |
root |
1.3 |
if (!nreqs) |
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return; |
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root |
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 |
|
181 |
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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 |
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poll_cb (pTHX) |
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{ |
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dSP; |
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int count = 0; |
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aio_req req; |
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root |
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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root |
1.3 |
for (;;) |
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1.1 |
{ |
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root |
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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root |
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; |
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if (req->type == REQ_READ) |
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SvCUR_set (req->data, req->dataoffset |
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+ req->result > 0 ? req->result : 0); |
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if (req->data) |
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SvREFCNT_dec (req->data); |
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if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
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{ |
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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))); |
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root |
1.2 |
|
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if (req->type == REQ_OPEN) |
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{ |
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/* convert fd to fh */ |
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SV *fh; |
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248 |
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PUTBACK; |
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call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
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SPAGAIN; |
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fh = POPs; |
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254 |
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PUSHMARK (SP); |
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XPUSHs (fh); |
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} |
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root |
1.1 |
PUTBACK; |
259 |
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1.2 |
call_sv (req->callback, G_VOID | G_EVAL); |
260 |
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1.1 |
SPAGAIN; |
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262 |
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if (req->callback) |
263 |
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SvREFCNT_dec (req->callback); |
264 |
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265 |
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errno = errorno; |
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count++; |
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} |
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269 |
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Safefree (req); |
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} |
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return count; |
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} |
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275 |
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static void * |
276 |
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aio_proc (void *thr_arg) |
277 |
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{ |
278 |
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aio_req req; |
279 |
root |
1.3 |
int type; |
280 |
root |
1.1 |
|
281 |
root |
1.3 |
do |
282 |
root |
1.1 |
{ |
283 |
root |
1.3 |
pthread_mutex_lock (&reqlock); |
284 |
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285 |
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for (;;) |
286 |
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{ |
287 |
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req = reqs; |
288 |
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289 |
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if (reqs) |
290 |
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{ |
291 |
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reqs = reqs->next; |
292 |
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if (!reqs) reqe = 0; |
293 |
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} |
294 |
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295 |
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if (req) |
296 |
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break; |
297 |
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298 |
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pthread_cond_wait (&reqwait, &reqlock); |
299 |
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} |
300 |
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301 |
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pthread_mutex_unlock (&reqlock); |
302 |
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303 |
root |
1.1 |
errno = 0; /* strictly unnecessary */ |
304 |
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305 |
root |
1.3 |
type = req->type; |
306 |
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307 |
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switch (type) |
308 |
root |
1.1 |
{ |
309 |
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case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; |
310 |
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case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; |
311 |
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#if SYS_readahead |
312 |
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case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
313 |
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#else |
314 |
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case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; |
315 |
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#endif |
316 |
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317 |
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case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
318 |
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case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
319 |
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case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
320 |
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321 |
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case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
322 |
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case REQ_CLOSE: req->result = close (req->fd); break; |
323 |
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case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
324 |
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325 |
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case REQ_FSYNC: req->result = fsync (req->fd); break; |
326 |
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case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
327 |
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328 |
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case REQ_QUIT: |
329 |
root |
1.3 |
break; |
330 |
root |
1.1 |
|
331 |
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default: |
332 |
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req->result = ENOSYS; |
333 |
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break; |
334 |
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} |
335 |
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336 |
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req->errorno = errno; |
337 |
root |
1.3 |
|
338 |
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pthread_mutex_lock (&reslock); |
339 |
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340 |
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req->next = 0; |
341 |
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342 |
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if (rese) |
343 |
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{ |
344 |
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rese->next = req; |
345 |
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rese = req; |
346 |
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} |
347 |
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else |
348 |
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{ |
349 |
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rese = ress = req; |
350 |
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351 |
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/* write a dummy byte to the pipe so fh becomes ready */ |
352 |
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write (respipe [1], &respipe, 1); |
353 |
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} |
354 |
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355 |
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pthread_mutex_unlock (&reslock); |
356 |
root |
1.1 |
} |
357 |
root |
1.3 |
while (type != REQ_QUIT); |
358 |
root |
1.1 |
|
359 |
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return 0; |
360 |
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} |
361 |
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362 |
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MODULE = IO::AIO PACKAGE = IO::AIO |
363 |
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364 |
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BOOT: |
365 |
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{ |
366 |
root |
1.3 |
if (pipe (respipe)) |
367 |
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croak ("unable to initialize result pipe"); |
368 |
root |
1.1 |
|
369 |
root |
1.3 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
370 |
root |
1.1 |
croak ("cannot set result pipe to nonblocking mode"); |
371 |
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|
372 |
root |
1.3 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
373 |
root |
1.1 |
croak ("cannot set result pipe to nonblocking mode"); |
374 |
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} |
375 |
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|
376 |
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void |
377 |
|
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min_parallel(nthreads) |
378 |
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int nthreads |
379 |
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PROTOTYPE: $ |
380 |
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CODE: |
381 |
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while (nthreads > started) |
382 |
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start_thread (); |
383 |
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|
384 |
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void |
385 |
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max_parallel(nthreads) |
386 |
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int nthreads |
387 |
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PROTOTYPE: $ |
388 |
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CODE: |
389 |
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{ |
390 |
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int cur = started; |
391 |
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while (cur > nthreads) |
392 |
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{ |
393 |
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end_thread (); |
394 |
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cur--; |
395 |
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} |
396 |
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397 |
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while (started > nthreads) |
398 |
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{ |
399 |
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poll_wait (); |
400 |
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poll_cb (aTHX); |
401 |
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} |
402 |
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} |
403 |
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|
404 |
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void |
405 |
|
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aio_open(pathname,flags,mode,callback) |
406 |
|
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SV * pathname |
407 |
|
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int flags |
408 |
|
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int mode |
409 |
|
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SV * callback |
410 |
|
|
PROTOTYPE: $$$$ |
411 |
|
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CODE: |
412 |
|
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{ |
413 |
|
|
aio_req req; |
414 |
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|
415 |
|
|
Newz (0, req, 1, aio_cb); |
416 |
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|
417 |
|
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if (!req) |
418 |
|
|
croak ("out of memory during aio_req allocation"); |
419 |
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|
420 |
|
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req->type = REQ_OPEN; |
421 |
|
|
req->data = newSVsv (pathname); |
422 |
|
|
req->dataptr = SvPV_nolen (req->data); |
423 |
|
|
req->fd = flags; |
424 |
|
|
req->mode = mode; |
425 |
|
|
req->callback = SvREFCNT_inc (callback); |
426 |
|
|
|
427 |
|
|
send_req (req); |
428 |
|
|
} |
429 |
|
|
|
430 |
|
|
void |
431 |
|
|
aio_close(fh,callback) |
432 |
|
|
InputStream fh |
433 |
|
|
SV * callback |
434 |
|
|
PROTOTYPE: $$ |
435 |
|
|
ALIAS: |
436 |
|
|
aio_close = REQ_CLOSE |
437 |
|
|
aio_fsync = REQ_FSYNC |
438 |
|
|
aio_fdatasync = REQ_FDATASYNC |
439 |
|
|
CODE: |
440 |
|
|
{ |
441 |
|
|
aio_req req; |
442 |
|
|
|
443 |
|
|
Newz (0, req, 1, aio_cb); |
444 |
|
|
|
445 |
|
|
if (!req) |
446 |
|
|
croak ("out of memory during aio_req allocation"); |
447 |
|
|
|
448 |
|
|
req->type = ix; |
449 |
|
|
req->fd = PerlIO_fileno (fh); |
450 |
|
|
req->callback = SvREFCNT_inc (callback); |
451 |
|
|
|
452 |
|
|
send_req (req); |
453 |
|
|
} |
454 |
|
|
|
455 |
|
|
void |
456 |
|
|
aio_read(fh,offset,length,data,dataoffset,callback) |
457 |
|
|
InputStream fh |
458 |
|
|
UV offset |
459 |
|
|
IV length |
460 |
|
|
SV * data |
461 |
|
|
IV dataoffset |
462 |
|
|
SV * callback |
463 |
|
|
PROTOTYPE: $$$$$$ |
464 |
|
|
CODE: |
465 |
|
|
read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
466 |
|
|
|
467 |
|
|
void |
468 |
|
|
aio_write(fh,offset,length,data,dataoffset,callback) |
469 |
|
|
OutputStream fh |
470 |
|
|
UV offset |
471 |
|
|
IV length |
472 |
|
|
SV * data |
473 |
|
|
IV dataoffset |
474 |
|
|
SV * callback |
475 |
|
|
PROTOTYPE: $$$$$$ |
476 |
|
|
CODE: |
477 |
|
|
read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
478 |
|
|
|
479 |
|
|
void |
480 |
|
|
aio_readahead(fh,offset,length,callback) |
481 |
|
|
InputStream fh |
482 |
|
|
UV offset |
483 |
|
|
IV length |
484 |
|
|
SV * callback |
485 |
|
|
PROTOTYPE: $$$$ |
486 |
|
|
CODE: |
487 |
|
|
{ |
488 |
|
|
aio_req req; |
489 |
|
|
|
490 |
|
|
if (length < 0) |
491 |
|
|
croak ("length must not be negative"); |
492 |
|
|
|
493 |
|
|
Newz (0, req, 1, aio_cb); |
494 |
|
|
|
495 |
|
|
if (!req) |
496 |
|
|
croak ("out of memory during aio_req allocation"); |
497 |
|
|
|
498 |
|
|
req->type = REQ_READAHEAD; |
499 |
|
|
req->fd = PerlIO_fileno (fh); |
500 |
|
|
req->offset = offset; |
501 |
|
|
req->length = length; |
502 |
|
|
req->callback = SvREFCNT_inc (callback); |
503 |
|
|
|
504 |
|
|
send_req (req); |
505 |
|
|
} |
506 |
|
|
|
507 |
|
|
void |
508 |
|
|
aio_stat(fh_or_path,callback) |
509 |
|
|
SV * fh_or_path |
510 |
|
|
SV * callback |
511 |
|
|
PROTOTYPE: $$ |
512 |
|
|
ALIAS: |
513 |
|
|
aio_lstat = 1 |
514 |
|
|
CODE: |
515 |
|
|
{ |
516 |
|
|
aio_req req; |
517 |
|
|
|
518 |
|
|
Newz (0, req, 1, aio_cb); |
519 |
|
|
|
520 |
|
|
if (!req) |
521 |
|
|
croak ("out of memory during aio_req allocation"); |
522 |
|
|
|
523 |
|
|
New (0, req->statdata, 1, Stat_t); |
524 |
|
|
|
525 |
|
|
if (!req->statdata) |
526 |
|
|
croak ("out of memory during aio_req->statdata allocation"); |
527 |
|
|
|
528 |
|
|
if (SvPOK (fh_or_path)) |
529 |
|
|
{ |
530 |
|
|
req->type = ix ? REQ_LSTAT : REQ_STAT; |
531 |
|
|
req->data = newSVsv (fh_or_path); |
532 |
|
|
req->dataptr = SvPV_nolen (req->data); |
533 |
|
|
} |
534 |
|
|
else |
535 |
|
|
{ |
536 |
|
|
req->type = REQ_FSTAT; |
537 |
|
|
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
538 |
|
|
} |
539 |
|
|
|
540 |
|
|
req->callback = SvREFCNT_inc (callback); |
541 |
|
|
|
542 |
|
|
send_req (req); |
543 |
|
|
} |
544 |
|
|
|
545 |
|
|
void |
546 |
|
|
aio_unlink(pathname,callback) |
547 |
|
|
SV * pathname |
548 |
|
|
SV * callback |
549 |
|
|
PROTOTYPE: $$ |
550 |
|
|
CODE: |
551 |
|
|
{ |
552 |
|
|
aio_req req; |
553 |
|
|
|
554 |
|
|
Newz (0, req, 1, aio_cb); |
555 |
|
|
|
556 |
|
|
if (!req) |
557 |
|
|
croak ("out of memory during aio_req allocation"); |
558 |
|
|
|
559 |
|
|
req->type = REQ_UNLINK; |
560 |
|
|
req->data = newSVsv (pathname); |
561 |
|
|
req->dataptr = SvPV_nolen (req->data); |
562 |
|
|
req->callback = SvREFCNT_inc (callback); |
563 |
|
|
|
564 |
|
|
send_req (req); |
565 |
|
|
} |
566 |
|
|
|
567 |
|
|
int |
568 |
|
|
poll_fileno() |
569 |
|
|
PROTOTYPE: |
570 |
|
|
CODE: |
571 |
root |
1.3 |
RETVAL = respipe [0]; |
572 |
root |
1.1 |
OUTPUT: |
573 |
|
|
RETVAL |
574 |
|
|
|
575 |
|
|
int |
576 |
|
|
poll_cb(...) |
577 |
|
|
PROTOTYPE: |
578 |
|
|
CODE: |
579 |
|
|
RETVAL = poll_cb (aTHX); |
580 |
|
|
OUTPUT: |
581 |
|
|
RETVAL |
582 |
|
|
|
583 |
|
|
void |
584 |
|
|
poll_wait() |
585 |
|
|
PROTOTYPE: |
586 |
|
|
CODE: |
587 |
root |
1.3 |
if (nreqs) |
588 |
|
|
poll_wait (); |
589 |
root |
1.1 |
|
590 |
|
|
int |
591 |
|
|
nreqs() |
592 |
|
|
PROTOTYPE: |
593 |
|
|
CODE: |
594 |
|
|
RETVAL = nreqs; |
595 |
|
|
OUTPUT: |
596 |
|
|
RETVAL |
597 |
|
|
|