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#include <errno.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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|
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/* mariadb/mysql uses all these reserved macro names, and probably more :( */ |
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#undef read |
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#undef write |
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#undef close |
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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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#if HAVE_EV |
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# include "EVAPI.h" |
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# include "CoroAPI.h" |
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#endif |
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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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static int use_ev; |
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|
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#if MARIADB_VERSION_ID >= 100300 |
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|
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typedef unsigned char uchar; /* bug? */ |
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#include <ma_pvio.h> |
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|
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#define PVIO 1 |
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#define VIOPTR MARIADB_PVIO * |
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#define VIOM(vio) (vio)->methods |
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#define vioblocking blocking |
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#define vioclose close |
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#define VIODATA(vio) (vio)->data |
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/* ma_pvio_get_socket would be it, but it's only declared, not defined */ |
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#define VIOSD(vio) mysql_get_socket ((vio)->mysql) |
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#define VIO_READ_BUFFER_SIZE PVIO_READ_AHEAD_CACHE_SIZE |
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#define my_to_vio(sock) (sock)->net.pvio |
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|
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#define OURDATAPTR ((ourdata *)vio->methods) |
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|
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typedef uchar *xgptr; |
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typedef const uchar *cxgptr; |
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typedef size_t xsize_t; |
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typedef ssize_t xssize_t; |
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typedef my_bool xmy_bool; |
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|
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#else |
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|
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#include "violite.h" |
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|
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#define PVIO 0 |
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#define VIOPTR Vio * |
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#define VIOM(vio) vio |
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#define VIODATA(vio) (vio)->desc |
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#define VIOSD(vio) (vio)->sd |
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#define my_to_vio(sock) (sock)->net.vio |
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|
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typedef int xmy_bool; |
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|
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#endif |
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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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#if PVIO |
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/* must be first member */ |
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struct st_ma_pvio_methods methods; |
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#else |
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#if DESC_IS_PTR |
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char desc[30]; |
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const char *old_desc; |
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#endif |
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#endif |
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int magic; |
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SV *corohandle_sv, *corohandle; |
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int bufofs, bufcnt; |
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#if HAVE_EV |
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ev_io rw, ww; |
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#endif |
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char buf[VIO_READ_BUFFER_SIZE]; |
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#if PVIO |
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struct st_ma_pvio_methods *oldmethods; |
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#else |
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xssize_t (*old_read)(VIOPTR, uchar *, size_t); |
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xssize_t (*old_write)(VIOPTR, const uchar *, size_t); |
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xmy_bool (*old_close)(VIOPTR); |
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#endif |
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} ourdata; |
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|
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#ifndef OURDATAPTR |
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#if DESC_IS_PTR |
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# define OURDATAPTR (*(ourdata **)&((vio)->desc)) |
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#else |
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# define DESC_OFFSET 22 |
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# define OURDATAPTR (*((ourdata **)((vio)->desc + DESC_OFFSET))) |
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#endif |
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#endif |
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|
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static xssize_t |
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our_read (VIOPTR vio, xgptr p, xsize_t 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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VIOM (vio)->vioblocking (vio, 0, &dummy); |
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|
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for (;;) |
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{ |
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rd = recv (VIOSD (vio), 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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#if HAVE_EV |
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if (use_ev) |
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{ |
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our->rw.data = (void *)sv_2mortal (SvREFCNT_inc (CORO_CURRENT)); |
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ev_io_start (EV_DEFAULT_UC, &(our->rw)); |
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CORO_SCHEDULE; |
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ev_io_stop (EV_DEFAULT_UC, &(our->rw)); /* avoids races */ |
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} |
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else |
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#endif |
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{ |
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dSP; |
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PUSHMARK (SP); |
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XPUSHs (our->corohandle); |
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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 xssize_t |
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our_write (VIOPTR vio, cxgptr p, xsize_t 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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VIOM (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 (VIOSD (vio), 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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ourdata *our = OURDATAPTR; |
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|
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#if HAVE_EV |
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if (use_ev) |
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{ |
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our->ww.data = (void *)sv_2mortal (SvREFCNT_inc (CORO_CURRENT)); |
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ev_io_start (EV_DEFAULT_UC, &(our->ww)); |
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CORO_SCHEDULE; |
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ev_io_stop (EV_DEFAULT_UC, &(our->ww)); /* avoids races */ |
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} |
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else |
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#endif |
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{ |
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dSP; |
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PUSHMARK (SP); |
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XPUSHs (our->corohandle); |
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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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} |
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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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static xmy_bool |
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our_close (VIOPTR vio) |
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{ |
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ourdata *our = OURDATAPTR; |
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|
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if (VIOM (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 (VIOM (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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if (VIOM (vio)->vioclose != our_close) |
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croak ("vio.vioclose has unexpected content during unpatch - wtf?"); |
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|
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#if HAVE_EV |
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if (use_ev) |
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{ |
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ev_io_stop (EV_DEFAULT_UC, &(our->rw)); |
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ev_io_stop (EV_DEFAULT_UC, &(our->ww)); |
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} |
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#endif |
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|
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SvREFCNT_dec (our->corohandle); |
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SvREFCNT_dec (our->corohandle_sv); |
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|
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#if DESC_IS_PTR |
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vio->desc = our->old_desc; |
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#endif |
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|
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#if PVIO |
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vio->methods = our->oldmethods; |
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#else |
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VIOM (vio)->vioclose = our->old_close; |
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VIOM (vio)->write = our->old_write; |
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VIOM (vio)->read = our->old_read; |
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#endif |
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|
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Safefree (our); |
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|
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VIOM (vio)->vioclose (vio); |
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} |
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|
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#if HAVE_EV |
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static void |
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iocb (EV_P_ ev_io *w, int revents) |
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{ |
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ev_io_stop (EV_A, w); |
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CORO_READY ((SV *)w->data); |
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} |
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#endif |
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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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_use_ev () |
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PPCODE: |
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{ |
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static int onceonly; |
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|
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if (!onceonly) |
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{ |
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onceonly = 1; |
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#if HAVE_EV |
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I_EV_API ("Coro::Mysql"); |
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I_CORO_API ("Coro::Mysql"); |
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use_ev = 1; |
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#endif |
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} |
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|
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XPUSHs (use_ev ? &PL_sv_yes : &PL_sv_no); |
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} |
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|
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void |
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_patch (IV sock, int fd, unsigned long client_version, SV *corohandle_sv, SV *corohandle) |
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CODE: |
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{ |
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MYSQL *my = (MYSQL *)sock; |
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VIOPTR vio = my_to_vio (my); |
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ourdata *our; |
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|
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/* matching versions are required but not sufficient */ |
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if (client_version != mysql_get_client_version ()) |
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croak ("DBD::mysql linked against different libmysqlclient library than Coro::Mysql (%lu vs. %lu).", |
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client_version, mysql_get_client_version ()); |
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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 != VIOSD (vio)) |
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croak ("DBD::mysql fd and vio-sd disagree - library mismatch, unsupported transport or API changes?"); |
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#if MYSQL_VERSION_ID < 100010 && !defined(MARIADB_BASE_VERSION) |
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if (VIOM (vio)->vioclose != vio_close) |
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croak ("vio.vioclose has unexpected content - library mismatch, unsupported transport or API changes?"); |
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|
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if (VIOM (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 (VIOM (vio)->read != vio_read |
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&& VIOM (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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#endif |
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#if PVIO |
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if (vio->type != PVIO_TYPE_UNIXSOCKET && vio->type != PVIO_TYPE_SOCKET) |
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croak ("connection type mismatch: Coro::Mysql only supports 'unixsocket' and 'socket' types at this time"); |
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#endif |
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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->corohandle_sv = newSVsv (corohandle_sv); |
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our->corohandle = newSVsv (corohandle); |
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#if HAVE_EV |
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if (use_ev) |
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{ |
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ev_io_init (&(our->rw), iocb, VIOSD (vio), EV_READ); |
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ev_io_init (&(our->ww), iocb, VIOSD (vio), EV_WRITE); |
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} |
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#endif |
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#if PVIO |
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/* with pvio, we replace methods by our own struct, |
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* both becauase the original might be read-only, |
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* and because we have no private data member, so the |
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* methods pointer includes our data as well |
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*/ |
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our->methods = *vio->methods; |
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our->oldmethods = vio->methods; |
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vio->methods = &our->methods; |
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#else |
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OURDATAPTR = our; |
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#if DESC_IS_PTR |
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our->old_desc = vio->desc; |
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strncpy (our->desc, vio->desc, sizeof (our->desc)); |
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our->desc [sizeof (our->desc) - 1] = 0; |
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#else |
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vio->desc [DESC_OFFSET - 1] = 0; |
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#endif |
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our->old_close = VIOM (vio)->vioclose; |
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our->old_write = VIOM (vio)->write; |
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our->old_read = VIOM (vio)->read; |
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#endif |
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|
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/* with pvio, this patches our own struct */ |
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VIOM (vio)->vioclose = our_close; |
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VIOM (vio)->write = our_write; |
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VIOM (vio)->read = our_read; |
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} |
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|
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int |
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_is_patched (IV sock) |
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CODE: |
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{ |
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MYSQL *my = (MYSQL *)sock; |
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VIOPTR vio = my_to_vio (my); |
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RETVAL = VIOM (vio)->write == our_write; |
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} |
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OUTPUT: RETVAL |
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|
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int |
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have_ev () |
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CODE: |
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RETVAL = 0; |
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#if HAVE_EV |
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RETVAL = 1; |
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#endif |
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OUTPUT: RETVAL |
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|