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Comparing libev/ev_select.c (file contents):
Revision 1.11 by root, Sun Nov 4 00:24:17 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 49
45static void 50static void
46select_modify (EV_P_ int fd, int oev, int nev) 51select_modify (EV_P_ int fd, int oev, int nev)
47{ 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 {
48 int offs = fd >> 3; 74 int offs = fd >> 3;
49 int mask = 1 << (fd & 7); 75 int mask = 1 << (fd & 7);
50 76
51 if (vec_max < (fd >> 5) + 1) 77 if (vec_max < (fd >> 5) + 1)
52 { 78 {
53 int new_max = (fd >> 5) + 1; 79 int new_max = (fd >> 5) + 1;
54 80
55 vec_ri = (unsigned char *)realloc (vec_ri, new_max * 4); 81 vec_ri = (unsigned char *)ev_realloc (vec_ri, new_max * 4);
56 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 */
57 vec_wi = (unsigned char *)realloc (vec_wi, new_max * 4); 83 vec_wi = (unsigned char *)ev_realloc (vec_wi, new_max * 4);
58 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 */
59 85
60 for (; vec_max < new_max; ++vec_max) 86 for (; vec_max < new_max; ++vec_max)
61 ((uint32_t *)vec_ri)[vec_max] = 87 ((uint32_t *)vec_ri)[vec_max] =
62 ((uint32_t *)vec_wi)[vec_max] = 0; 88 ((uint32_t *)vec_wi)[vec_max] = 0;
63 } 89 }
64 90
65 vec_ri [offs] |= mask; 91 vec_ri [offs] |= mask;
66 if (!(nev & EV_READ)) 92 if (!(nev & EV_READ))
67 vec_ri [offs] &= ~mask; 93 vec_ri [offs] &= ~mask;
68 94
69 vec_wi [offs] |= mask; 95 vec_wi [offs] |= mask;
70 if (!(nev & EV_WRITE)) 96 if (!(nev & EV_WRITE))
71 vec_wi [offs] &= ~mask; 97 vec_wi [offs] &= ~mask;
98 }
99#endif
72} 100}
73 101
74static void 102static void
75select_poll (EV_P_ ev_tstamp timeout) 103select_poll (EV_P_ ev_tstamp timeout)
76{ 104{
105 int word, offs;
77 struct timeval tv; 106 struct timeval tv;
78 int res; 107 int res;
79 108
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
80 memcpy (vec_ro, vec_ri, vec_max * 4); 113 memcpy (vec_ro, vec_ri, vec_max * 4);
81 memcpy (vec_wo, vec_wi, vec_max * 4); 114 memcpy (vec_wo, vec_wi, vec_max * 4);
115#endif
82 116
83 tv.tv_sec = (long)timeout; 117 tv.tv_sec = (long)timeout;
84 tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6); 118 tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6);
85 119
86 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);
87 121
88 if (res > 0) 122 if (res < 0)
89 {
90 int word, offs;
91
92 for (word = vec_max; word--; )
93 {
94 if (((uint32_t *)vec_ro) [word] | ((uint32_t *)vec_wo) [word])
95 for (offs = 4; offs--; )
96 {
97 int idx = word * 4 + offs;
98 unsigned char byte_r = vec_ro [idx];
99 unsigned char byte_w = vec_wo [idx];
100 int bit;
101
102 if (byte_r | byte_w)
103 for (bit = 8; bit--; )
104 {
105 int events = 0;
106 events |= byte_r & (1 << bit) ? EV_READ : 0;
107 events |= byte_w & (1 << bit) ? EV_WRITE : 0;
108
109 if (events)
110 fd_event (EV_A_ idx * 8 + bit, events);
111 }
112 }
113 }
114 } 123 {
115 else if (res < 0) 124#ifdef WIN32
116 { 125 if (errno == WSAEINTR ) errno = EINTR;
126 if (errno == WSAENOTSOCK) errno = EBADF;
127#endif
128
117 if (errno == EBADF) 129 if (errno == EBADF)
118 fd_ebadf (EV_A); 130 fd_ebadf (EV_A);
119 else if (errno == ENOMEM) 131 else if (errno == ENOMEM && !syserr_cb)
120 fd_enomem (EV_A); 132 fd_enomem (EV_A);
133 else if (errno != EINTR)
134 syserr ("(libev) select");
135
136 return;
137 }
138
139#if EV_SELECT_USE_FD_SET
140# if EV_SELECT_USE_WIN32_HANDLES
141 for (word = 0; word < anfdmax; ++word)
121 } 142 {
143 if (!anfd [word].events)
144 {
145 int fd = _get_osfhandle (word);
146
147 if (fd >= 0)
148 {
149 int events = 0;
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
154 if (events)
155 fd_event (EV_A_ word, events);
156 }
157 }
158 }
159# else
160 for (word = 0; word < FD_SETSIZE; ++word)
161 {
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;
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
122} 194}
123 195
124static int 196static int
125select_init (EV_P_ int flags) 197select_init (EV_P_ int flags)
126{ 198{
127 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 */
128 method_modify = select_modify; 200 method_modify = select_modify;
129 method_poll = select_poll; 201 method_poll = select_poll;
130 202
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
131 return EVMETHOD_SELECT; 217 return EVMETHOD_SELECT;
132} 218}
133 219
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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