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Comparing libev/ev_select.c (file contents):
Revision 1.9 by root, Sat Nov 3 09:19:58 2007 UTC vs.
Revision 1.19 by root, Thu Nov 8 16:58:00 2007 UTC

… …
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 30 */
31 31
32/* for broken bsd's */
33#include <sys/time.h>
34#include <sys/types.h>
35#include <unistd.h>
36
37/* for unix systems */ 32/* for unix systems */
38#ifndef WIN32 33#if WIN32
34typedef unsigned int uint32_t;
35# ifndef EV_SELECT_USE_FD_SET
36# define EV_SELECT_USE_FD_SET 1
37# endif
38#else
39# include <sys/select.h> 39# include <sys/select.h>
40# include <inttypes.h>
41#endif
42
43#if EV_SELECT_USE_WIN32_HANDLES
44# undef EV_SELECT_USE_FD_SET
45# define EV_SELECT_USE_FD_SET 1
40#endif 46#endif
41 47
42#include <string.h> 48#include <string.h>
43#include <inttypes.h>
44
45static unsigned char *vec_ri, *vec_ro, *vec_wi, *vec_wo;
46static int vec_max;
47 49
48static void 50static void
49select_modify (int fd, int oev, int nev) 51select_modify (EV_P_ int fd, int oev, int nev)
50{ 52{
53 if (oev == nev)
54 return;
55
56#if EV_SELECT_USE_FD_SET
57# if EV_SELECT_USE_WIN32_HANDLES
58 fd = _get_osfhandle (fd);
59 if (fd < 0)
60 return;
61# endif
62
63 if (nev & EV_READ)
64 FD_SET (fd, (struct fd_set *)vec_ri);
65 else
66 FD_CLR (fd, (struct fd_set *)vec_ri);
67
68 if (nev & EV_WRITE)
69 FD_SET (fd, (struct fd_set *)vec_wi);
70 else
71 FD_CLR (fd, (struct fd_set *)vec_wi);
72#else
73 {
51 int offs = fd >> 3; 74 int offs = fd >> 3;
52 int mask = 1 << (fd & 7); 75 int mask = 1 << (fd & 7);
53 76
54 if (vec_max < (fd >> 5) + 1) 77 if (vec_max < (fd >> 5) + 1)
55 { 78 {
56 int new_max = (fd >> 5) + 1; 79 int new_max = (fd >> 5) + 1;
57 80
58 vec_ri = (unsigned char *)realloc (vec_ri, new_max * 4); 81 vec_ri = (unsigned char *)ev_realloc (vec_ri, new_max * 4);
59 vec_ro = (unsigned char *)realloc (vec_ro, new_max * 4); /* could free/malloc */ 82 vec_ro = (unsigned char *)ev_realloc (vec_ro, new_max * 4); /* could free/malloc */
60 vec_wi = (unsigned char *)realloc (vec_wi, new_max * 4); 83 vec_wi = (unsigned char *)ev_realloc (vec_wi, new_max * 4);
61 vec_wo = (unsigned char *)realloc (vec_wo, new_max * 4); /* could free/malloc */ 84 vec_wo = (unsigned char *)ev_realloc (vec_wo, new_max * 4); /* could free/malloc */
62 85
63 for (; vec_max < new_max; ++vec_max) 86 for (; vec_max < new_max; ++vec_max)
64 ((uint32_t *)vec_ri)[vec_max] = 87 ((uint32_t *)vec_ri)[vec_max] =
65 ((uint32_t *)vec_wi)[vec_max] = 0; 88 ((uint32_t *)vec_wi)[vec_max] = 0;
66 } 89 }
67 90
68 vec_ri [offs] |= mask; 91 vec_ri [offs] |= mask;
69 if (!(nev & EV_READ)) 92 if (!(nev & EV_READ))
70 vec_ri [offs] &= ~mask; 93 vec_ri [offs] &= ~mask;
71 94
72 vec_wi [offs] |= mask; 95 vec_wi [offs] |= mask;
73 if (!(nev & EV_WRITE)) 96 if (!(nev & EV_WRITE))
74 vec_wi [offs] &= ~mask; 97 vec_wi [offs] &= ~mask;
98 }
99#endif
75} 100}
76 101
77static void 102static void
78select_poll (ev_tstamp timeout) 103select_poll (EV_P_ ev_tstamp timeout)
79{ 104{
105 int word, offs;
80 struct timeval tv; 106 struct timeval tv;
81 int res; 107 int res;
82 108
109#if EV_SELECT_USE_FD_SET
110 memcpy (vec_ro, vec_ri, sizeof (struct fd_set));
111 memcpy (vec_wo, vec_wi, sizeof (struct fd_set));
112#else
83 memcpy (vec_ro, vec_ri, vec_max * 4); 113 memcpy (vec_ro, vec_ri, vec_max * 4);
84 memcpy (vec_wo, vec_wi, vec_max * 4); 114 memcpy (vec_wo, vec_wi, vec_max * 4);
115#endif
85 116
86 tv.tv_sec = (long)timeout; 117 tv.tv_sec = (long)timeout;
87 tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6); 118 tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6);
88 119
89 res = select (vec_max * 32, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); 120 res = select (vec_max * 32, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv);
90 121
91 if (res > 0) 122 if (res < 0)
123 {
124#ifdef WIN32
125 if (errno == WSAEINTR ) errno = EINTR;
126 if (errno == WSAENOTSOCK) errno = EBADF;
127#endif
128
129 if (errno == EBADF)
130 fd_ebadf (EV_A);
131 else if (errno == ENOMEM && !syserr_cb)
132 fd_enomem (EV_A);
133 else if (errno != EINTR)
134 syserr ("(libev) select");
135
136 return;
92 { 137 }
93 int word, offs;
94 138
95 for (word = vec_max; word--; ) 139#if EV_SELECT_USE_FD_SET
140# if EV_SELECT_USE_WIN32_HANDLES
141 for (word = 0; word < anfdmax; ++word)
142 {
143 if (!anfd [word].events)
96 { 144 {
97 if (((uint32_t *)vec_ro) [word] | ((uint32_t *)vec_wo) [word]) 145 int fd = _get_osfhandle (word);
98 for (offs = 4; offs--; ) 146
147 if (fd >= 0)
99 { 148 {
100 int idx = word * 4 + offs;
101 unsigned char byte_r = vec_ro [idx];
102 unsigned char byte_w = vec_wo [idx];
103 int bit;
104
105 if (byte_r | byte_w)
106 for (bit = 8; bit--; )
107 {
108 int events = 0; 149 int events = 0;
109 events |= byte_r & (1 << bit) ? EV_READ : 0;
110 events |= byte_w & (1 << bit) ? EV_WRITE : 0;
111 150
151 if (FD_ISSET (fd, (struct fd_set *)vec_ro)) events |= EV_READ;
152 if (FD_ISSET (fd, (struct fd_set *)vec_wo)) events |= EV_WRITE;
153
112 if (events) 154 if (events)
113 fd_event (idx * 8 + bit, events); 155 fd_event (EV_A_ word, events);
114 }
115 } 156 }
116 } 157 }
117 } 158 }
118 else if (res < 0) 159# else
119 { 160 for (word = 0; word < FD_SETSIZE; ++word)
120 if (errno == EBADF)
121 fd_ebadf ();
122 else if (errno == ENOMEM)
123 fd_enomem ();
124 } 161 {
125} 162 int events = 0;
163 if (FD_ISSET (word, (struct fd_set *)vec_ro)) events |= EV_READ;
164 if (FD_ISSET (word, (struct fd_set *)vec_wo)) events |= EV_WRITE;
126 165
166 if (events)
167 fd_event (EV_A_ word, events);
168 }
169# endif
170#else
171 for (word = vec_max; word--; )
172 {
173 if (((uint32_t *)vec_ro) [word] | ((uint32_t *)vec_wo) [word])
174 for (offs = 4; offs--; )
175 {
176 int idx = word * 4 + offs;
177 unsigned char byte_r = vec_ro [idx];
178 unsigned char byte_w = vec_wo [idx];
179 int bit;
180
181 if (byte_r | byte_w)
182 for (bit = 8; bit--; )
183 {
184 int events = 0;
185 events |= byte_r & (1 << bit) ? EV_READ : 0;
186 events |= byte_w & (1 << bit) ? EV_WRITE : 0;
187
188 if (events)
189 fd_event (EV_A_ idx * 8 + bit, events);
190 }
191 }
192 }
193#endif
194}
195
127static void 196static int
128select_init (int flags) 197select_init (EV_P_ int flags)
129{ 198{
130 ev_method = EVMETHOD_SELECT;
131 method_fudge = 1e-2; /* needed to compensate for select returning early, very conservative */ 199 method_fudge = 1e-2; /* needed to compensate for select returning early, very conservative */
132 method_modify = select_modify; 200 method_modify = select_modify;
133 method_poll = select_poll; 201 method_poll = select_poll;
134}
135 202
203#if EV_SELECT_USE_FD_SET
204 vec_max = FD_SETSIZE / 32;
205 vec_ri = ev_malloc (sizeof (struct fd_set)); FD_ZERO ((struct fd_set *)vec_ri);
206 vec_ro = ev_malloc (sizeof (struct fd_set));
207 vec_wi = ev_malloc (sizeof (struct fd_set)); FD_ZERO ((struct fd_set *)vec_wi);
208 vec_wo = ev_malloc (sizeof (struct fd_set));
209#else
210 vec_max = 0;
211 vec_ri = 0;
212 vec_ri = 0;
213 vec_wo = 0;
214 vec_wo = 0;
215#endif
216
217 return EVMETHOD_SELECT;
218}
219
220static void
221select_destroy (EV_P)
222{
223 ev_free (vec_ri);
224 ev_free (vec_ro);
225 ev_free (vec_wi);
226 ev_free (vec_wo);
227}
228
229

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