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#include <sys/errno.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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|
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#include <mysql.h> |
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|
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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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|
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#define IN_DESTRUCT PL_dirty |
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|
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typedef U16 uint16; |
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|
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/* cached function gv's */ |
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static CV *readable, *writable; |
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|
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#include "violite.h" |
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|
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#define DESC_OFFSET 22 |
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|
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#define CoMy_MAGIC 0x436f4d79 |
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|
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typedef struct { |
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int magic; |
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SV *corosocket; |
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int bufofs, bufcnt; |
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char buf[VIO_READ_BUFFER_SIZE]; |
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} ourdata; |
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|
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#define OURDATAPTR (*((ourdata **)((vio)->desc + DESC_OFFSET))) |
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|
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static int |
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our_read (Vio *vio, gptr p, int len) |
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{ |
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ourdata *our = OURDATAPTR; |
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|
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if (!our->bufcnt) |
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{ |
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int rd; |
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my_bool dummy; |
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|
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vio->vioblocking (vio, 0, &dummy); |
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|
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for (;;) |
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{ |
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rd = recv (vio->sd, our->buf, sizeof (our->buf), 0); |
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|
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if (rd >= 0 || errno != EAGAIN) |
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break; |
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|
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{ |
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dSP; |
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PUSHMARK (SP); |
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XPUSHs (our->corosocket); |
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PUTBACK; |
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call_sv ((SV *)readable, G_VOID | G_DISCARD); |
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} |
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} |
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|
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if (rd <= 0) |
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return rd; |
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|
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our->bufcnt = rd; |
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our->bufofs = 0; |
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} |
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|
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if (our->bufcnt < len) |
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len = our->bufcnt; |
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|
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memcpy (p, our->buf + our->bufofs, len); |
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our->bufofs += len; |
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our->bufcnt -= len; |
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|
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return len; |
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} |
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|
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static int |
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our_write (Vio *vio, const gptr p, int len) |
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{ |
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char *ptr = (char *)p; |
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my_bool dummy; |
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|
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vio->vioblocking (vio, 0, &dummy); |
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|
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while (len > 0) |
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{ |
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int wr = send (vio->sd, ptr, len, 0); |
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|
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if (wr > 0) |
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{ |
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ptr += wr; |
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len -= wr; |
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} |
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else if (errno == EAGAIN) |
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{ |
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dSP; |
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PUSHMARK (SP); |
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XPUSHs (OURDATAPTR->corosocket); |
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PUTBACK; |
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call_sv ((SV *)writable, G_VOID | G_DISCARD); |
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} |
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else if (ptr == (char *)p) |
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return -1; |
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else |
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break; |
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} |
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|
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return ptr - (char *)p; |
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} |
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|
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MODULE = Coro::Mysql PACKAGE = Coro::Mysql |
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|
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BOOT: |
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{ |
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readable = get_cv ("Coro::Mysql::readable", 0); |
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writable = get_cv ("Coro::Mysql::writable", 0); |
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} |
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|
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PROTOTYPES: ENABLE |
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|
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void |
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_patch (IV sock, int fd, SV *corosocket) |
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CODE: |
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{ |
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MYSQL *my = (MYSQL *)sock; |
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Vio *vio = my->net.vio; |
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ourdata *our; |
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|
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if (fd != my->net.fd) |
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croak ("DBD::mysql fd and libmysql disagree - library mismatch, unsupported transport or API changes?"); |
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|
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if (fd != vio->sd) |
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croak ("DBD::mysql fd and vio-sd disagree - library mismatch, unsupported transport or API changes?"); |
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|
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if (vio->write != vio_write) |
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croak ("vio.write has unexpected content - library mismatch, unsupported transport or API changes?"); |
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|
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if (vio->read != vio_read && vio->read != vio_read_buff) |
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croak ("vio.read has unexpected content - library mismatch, unsupported transport or API changes?"); |
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|
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Newz (0, our, 1, ourdata); |
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our->magic = CoMy_MAGIC; |
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our->corosocket = newSVsv (corosocket); |
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|
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vio->desc [DESC_OFFSET - 1] = 0; |
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OURDATAPTR = our; |
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|
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vio->write = our_write; |
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vio->read = our_read; |
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} |
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|
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void |
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_unpatch (IV sock) |
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CODE: |
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if (IN_DESTRUCT) |
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{ |
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/* we currently leak data during global destruction */ |
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/* perl makes it extremely hard to do otherwise, though */ |
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MYSQL *my = (MYSQL *)sock; |
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Vio *vio = my->net.vio; |
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my_bool dummy; |
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|
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if (vio->read != our_read) |
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croak ("vio.read has unexpected content during unpatch - wtf?"); |
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|
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if (vio->write != our_write) |
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croak ("vio.write has unexpected content during unpatch - wtf?"); |
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|
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SvREFCNT_dec (OURDATAPTR->corosocket); |
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|
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Safefree (OURDATAPTR); |
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|
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vio->read = vio_read; |
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vio->write = vio_write; |
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} |
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|
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|
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