Coro-Mysql/Mysql.xs

#include <sys/errno.h>
#include <unistd.h>
#include <fcntl.h>

#include <mysql.h>

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#if HAVE_EV
# include "EVAPI.h"
# include "CoroAPI.h"
#endif

#define IN_DESTRUCT PL_dirty

typedef U16 uint16;

/* cached function gv's */
static CV *readable, *writable;
static int use_ev;

#include "violite.h"

#define DESC_OFFSET 22

#define CoMy_MAGIC 0x436f4d79

typedef struct {
  int magic;
  SV *corohandle_sv, *corohandle;
  int bufofs, bufcnt;
#if HAVE_EV
  ev_io rw, ww;
#endif
  char buf[VIO_READ_BUFFER_SIZE];
} ourdata;

#define OURDATAPTR (*((ourdata **)((vio)->desc + DESC_OFFSET)))

static int
our_read (Vio *vio, xgptr p, int len)
{
  ourdata *our = OURDATAPTR;

  if (!our->bufcnt)
    {
      int rd;
      my_bool dummy;

      vio->vioblocking (vio, 0, &dummy);

      for (;;)
        {
          rd = recv (vio->sd, our->buf, sizeof (our->buf), 0);

          if (rd >= 0 || errno != EAGAIN)
            break;

#if HAVE_EV
          if (use_ev)
            {
              our->rw.data = (void *)sv_2mortal (SvREFCNT_inc (CORO_CURRENT));
              ev_io_start (EV_DEFAULT_UC, &(our->rw));
              CORO_SCHEDULE;
              ev_io_stop (EV_DEFAULT_UC, &(our->rw)); /* avoids races */
            }
          else
#endif
            {
              dSP;
              PUSHMARK (SP);
              XPUSHs (our->corohandle);
              PUTBACK;
              call_sv ((SV *)readable, G_VOID | G_DISCARD);
            }
        }

      if (rd <= 0)
        return rd;

      our->bufcnt = rd;
      our->bufofs = 0;
    }

  if (our->bufcnt < len)
    len = our->bufcnt;

  memcpy (p, our->buf + our->bufofs, len);
  our->bufofs += len;
  our->bufcnt -= len;

  return len;
}

static int
our_write (Vio *vio, const xgptr p, int len)
{
  char *ptr = (char *)p;
  my_bool dummy;

  vio->vioblocking (vio, 0, &dummy);

  while (len > 0)
    {
      int wr = send (vio->sd, ptr, len, 0);

      if (wr > 0)
        {
          ptr += wr;
          len -= wr;
        }
      else if (errno == EAGAIN)
        {
          ourdata *our = OURDATAPTR;

#if HAVE_EV
          if (use_ev)
            {
              our->ww.data = (void *)sv_2mortal (SvREFCNT_inc (CORO_CURRENT));
              ev_io_start (EV_DEFAULT_UC, &(our->ww));
              CORO_SCHEDULE;
              ev_io_stop (EV_DEFAULT_UC, &(our->ww)); /* avoids races */
            }
          else
#endif
            {
              dSP;
              PUSHMARK (SP);
              XPUSHs (our->corohandle);
              PUTBACK;
              call_sv ((SV *)writable, G_VOID | G_DISCARD);
            }
        }
      else if (ptr == (char *)p)
        return -1;
      else
        break;
    }

  return ptr - (char *)p;
}

static int
our_close (Vio *vio)
{
  ourdata *our = OURDATAPTR;

  if (vio->read != our_read)
    croak ("vio.read has unexpected content during unpatch - wtf?");

  if (vio->write != our_write)
    croak ("vio.write has unexpected content during unpatch - wtf?");

  if (vio->vioclose != our_close)
    croak ("vio.vioclose has unexpected content during unpatch - wtf?");

#if HAVE_EV
  if (use_ev)
    {
      ev_io_stop (EV_DEFAULT_UC, &(our->rw));
      ev_io_stop (EV_DEFAULT_UC, &(our->ww));
    }
#endif

  SvREFCNT_dec (our->corohandle);
  SvREFCNT_dec (our->corohandle_sv);

  Safefree (our);

  vio->read     = vio_read;
  vio->write    = vio_write;
  vio->vioclose = vio_close;

  vio->vioclose (vio);
}

#if HAVE_EV
static void
iocb (EV_P_ ev_io *w, int revents)
{
  ev_io_stop (EV_A, w);
  CORO_READY ((SV *)w->data);
}
#endif

MODULE = Coro::Mysql            PACKAGE = Coro::Mysql

BOOT:
{
  readable = get_cv ("Coro::Mysql::readable", 0);
  writable = get_cv ("Coro::Mysql::writable", 0);
}

PROTOTYPES: ENABLE

void
_use_ev ()
        PPCODE:
{
        static int onceonly;

        if (!onceonly)
          {
            onceonly = 1;
#if HAVE_EV
            I_EV_API ("Coro::Mysql");
            I_CORO_API ("Coro::Mysql");
            use_ev = 1;
#endif
          }

        XPUSHs (use_ev ? &PL_sv_yes : &PL_sv_no);
}

void
_patch (IV sock, int fd, SV *corohandle_sv, SV *corohandle)
        CODE:
{
        MYSQL *my = (MYSQL *)sock;
        Vio *vio = my->net.vio;
        ourdata *our;

        if (fd != my->net.fd)
          croak ("DBD::mysql fd and libmysql disagree - library mismatch, unsupported transport or API changes?");

        if (fd != vio->sd)
          croak ("DBD::mysql fd and vio-sd disagree - library mismatch, unsupported transport or API changes?");

        if (vio->vioclose != vio_close)
          croak ("vio.write has unexpected content - library mismatch, unsupported transport or API changes?");

        if (vio->write != vio_write)
          croak ("vio.write has unexpected content - library mismatch, unsupported transport or API changes?");

        if (vio->read != vio_read
            && vio->read != vio_read_buff)
          croak ("vio.read has unexpected content - library mismatch, unsupported transport or API changes?");

        Newz (0, our, 1, ourdata);
        our->magic = CoMy_MAGIC;
        our->corohandle_sv = newSVsv (corohandle_sv);
        our->corohandle    = newSVsv (corohandle);
#if HAVE_EV
        if (use_ev)
          {
            ev_io_init (&(our->rw), iocb, vio->sd, EV_READ);
            ev_io_init (&(our->ww), iocb, vio->sd, EV_WRITE);
          }
#endif

        vio->desc [DESC_OFFSET - 1] = 0;
        OURDATAPTR = our;

        vio->vioclose = our_close;
        vio->write    = our_write;
        vio->read     = our_read;
}

Revision:	1.7
Committed:	Thu Feb 17 02:05:15 2011 UTC (13 years, 3 months ago) by root
Branch:	MAIN
CVS Tags:	rel-1_1
Changes since 1.6:	+93 -15 lines
Log Message:	* empty log message *
#	Content
1	#include <sys/errno.h>
2	#include <unistd.h>
3	#include <fcntl.h>
4
5	#include <mysql.h>
6
7	#include "EXTERN.h"
8	#include "perl.h"
9	#include "XSUB.h"
10
11	#if HAVE_EV
12	# include "EVAPI.h"
13	# include "CoroAPI.h"
14	#endif
15
16	#define IN_DESTRUCT PL_dirty
17
18	typedef U16 uint16;
19
20	/* cached function gv's */
21	static CV readable, writable;
22	static int use_ev;
23
24	#include "violite.h"
25
26	#define DESC_OFFSET 22
27
28	#define CoMy_MAGIC 0x436f4d79
29
30	typedef struct {
31	int magic;
32	SV corohandle_sv, corohandle;
33	int bufofs, bufcnt;
34	#if HAVE_EV
35	ev_io rw, ww;
36	#endif
37	char buf[VIO_READ_BUFFER_SIZE];
38	} ourdata;
39
40	#define OURDATAPTR (((ourdata *)((vio)->desc + DESC_OFFSET)))
41
42	static int
43	our_read (Vio *vio, xgptr p, int len)
44	{
45	ourdata *our = OURDATAPTR;
46
47	if (!our->bufcnt)
48	{
49	int rd;
50	my_bool dummy;
51
52	vio->vioblocking (vio, 0, &dummy);
53
54	for (;;)
55	{
56	rd = recv (vio->sd, our->buf, sizeof (our->buf), 0);
57
58	if (rd >= 0 \|\| errno != EAGAIN)
59	break;
60
61	#if HAVE_EV
62	if (use_ev)
63	{
64	our->rw.data = (void *)sv_2mortal (SvREFCNT_inc (CORO_CURRENT));
65	ev_io_start (EV_DEFAULT_UC, &(our->rw));
66	CORO_SCHEDULE;
67	ev_io_stop (EV_DEFAULT_UC, &(our->rw)); /* avoids races */
68	}
69	else
70	#endif
71	{
72	dSP;
73	PUSHMARK (SP);
74	XPUSHs (our->corohandle);
75	PUTBACK;
76	call_sv ((SV *)readable, G_VOID \| G_DISCARD);
77	}
78	}
79
80	if (rd <= 0)
81	return rd;
82
83	our->bufcnt = rd;
84	our->bufofs = 0;
85	}
86
87	if (our->bufcnt < len)
88	len = our->bufcnt;
89
90	memcpy (p, our->buf + our->bufofs, len);
91	our->bufofs += len;
92	our->bufcnt -= len;
93
94	return len;
95	}
96
97	static int
98	our_write (Vio *vio, const xgptr p, int len)
99	{
100	char ptr = (char )p;
101	my_bool dummy;
102
103	vio->vioblocking (vio, 0, &dummy);
104
105	while (len > 0)
106	{
107	int wr = send (vio->sd, ptr, len, 0);
108
109	if (wr > 0)
110	{
111	ptr += wr;
112	len -= wr;
113	}
114	else if (errno == EAGAIN)
115	{
116	ourdata *our = OURDATAPTR;
117
118	#if HAVE_EV
119	if (use_ev)
120	{
121	our->ww.data = (void *)sv_2mortal (SvREFCNT_inc (CORO_CURRENT));
122	ev_io_start (EV_DEFAULT_UC, &(our->ww));
123	CORO_SCHEDULE;
124	ev_io_stop (EV_DEFAULT_UC, &(our->ww)); /* avoids races */
125	}
126	else
127	#endif
128	{
129	dSP;
130	PUSHMARK (SP);
131	XPUSHs (our->corohandle);
132	PUTBACK;
133	call_sv ((SV *)writable, G_VOID \| G_DISCARD);
134	}
135	}
136	else if (ptr == (char *)p)
137	return -1;
138	else
139	break;
140	}
141
142	return ptr - (char *)p;
143	}
144
145	static int
146	our_close (Vio *vio)
147	{
148	ourdata *our = OURDATAPTR;
149
150	if (vio->read != our_read)
151	croak ("vio.read has unexpected content during unpatch - wtf?");
152
153	if (vio->write != our_write)
154	croak ("vio.write has unexpected content during unpatch - wtf?");
155
156	if (vio->vioclose != our_close)
157	croak ("vio.vioclose has unexpected content during unpatch - wtf?");
158
159	#if HAVE_EV
160	if (use_ev)
161	{
162	ev_io_stop (EV_DEFAULT_UC, &(our->rw));
163	ev_io_stop (EV_DEFAULT_UC, &(our->ww));
164	}
165	#endif
166
167	SvREFCNT_dec (our->corohandle);
168	SvREFCNT_dec (our->corohandle_sv);
169
170	Safefree (our);
171
172	vio->read = vio_read;
173	vio->write = vio_write;
174	vio->vioclose = vio_close;
175
176	vio->vioclose (vio);
177	}
178
179	#if HAVE_EV
180	static void
181	iocb (EV_P_ ev_io *w, int revents)
182	{
183	ev_io_stop (EV_A, w);
184	CORO_READY ((SV *)w->data);
185	}
186	#endif
187
188	MODULE = Coro::Mysql PACKAGE = Coro::Mysql
189
190	BOOT:
191	{
192	readable = get_cv ("Coro::Mysql::readable", 0);
193	writable = get_cv ("Coro::Mysql::writable", 0);
194	}
195
196	PROTOTYPES: ENABLE
197
198	void
199	_use_ev ()
200	PPCODE:
201	{
202	static int onceonly;
203
204	if (!onceonly)
205	{
206	onceonly = 1;
207	#if HAVE_EV
208	I_EV_API ("Coro::Mysql");
209	I_CORO_API ("Coro::Mysql");
210	use_ev = 1;
211	#endif
212	}
213
214	XPUSHs (use_ev ? &PL_sv_yes : &PL_sv_no);
215	}
216
217	void
218	_patch (IV sock, int fd, SV corohandle_sv, SV corohandle)
219	CODE:
220	{
221	MYSQL my = (MYSQL )sock;
222	Vio *vio = my->net.vio;
223	ourdata *our;
224
225	if (fd != my->net.fd)
226	croak ("DBD::mysql fd and libmysql disagree - library mismatch, unsupported transport or API changes?");
227
228	if (fd != vio->sd)
229	croak ("DBD::mysql fd and vio-sd disagree - library mismatch, unsupported transport or API changes?");
230
231	if (vio->vioclose != vio_close)
232	croak ("vio.write has unexpected content - library mismatch, unsupported transport or API changes?");
233
234	if (vio->write != vio_write)
235	croak ("vio.write has unexpected content - library mismatch, unsupported transport or API changes?");
236
237	if (vio->read != vio_read
238	&& vio->read != vio_read_buff)
239	croak ("vio.read has unexpected content - library mismatch, unsupported transport or API changes?");
240
241	Newz (0, our, 1, ourdata);
242	our->magic = CoMy_MAGIC;
243	our->corohandle_sv = newSVsv (corohandle_sv);
244	our->corohandle = newSVsv (corohandle);
245	#if HAVE_EV
246	if (use_ev)
247	{
248	ev_io_init (&(our->rw), iocb, vio->sd, EV_READ);
249	ev_io_init (&(our->ww), iocb, vio->sd, EV_WRITE);
250	}
251	#endif
252
253	vio->desc [DESC_OFFSET - 1] = 0;
254	OURDATAPTR = our;
255
256	vio->vioclose = our_close;
257	vio->write = our_write;
258	vio->read = our_read;
259	}
260