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/cvs/libev/ev_select.c
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Comparing libev/ev_select.c (file contents):
Revision 1.15 by root, Tue Nov 6 00:52:33 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{
48 int offs = fd >> 3;
49 int mask = 1 << (fd & 7);
50
51 if (oev == nev) 53 if (oev == nev)
52 return; 54 return;
53 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 {
74 int offs = fd >> 3;
75 int mask = 1 << (fd & 7);
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 *)ev_realloc (vec_ri, new_max * 4); 81 vec_ri = (unsigned char *)ev_realloc (vec_ri, new_max * 4);
59 vec_ro = (unsigned char *)ev_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 *)ev_realloc (vec_wi, new_max * 4); 83 vec_wi = (unsigned char *)ev_realloc (vec_wi, new_max * 4);
61 vec_wo = (unsigned char *)ev_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_P_ ev_tstamp timeout) 103select_poll (EV_P_ ev_tstamp timeout)
79{ 104{
80 int word, offs; 105 int word, offs;
81 struct timeval tv; 106 struct timeval tv;
82 int res; 107 int res;
83 108
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
84 memcpy (vec_ro, vec_ri, vec_max * 4); 113 memcpy (vec_ro, vec_ri, vec_max * 4);
85 memcpy (vec_wo, vec_wi, vec_max * 4); 114 memcpy (vec_wo, vec_wi, vec_max * 4);
115#endif
86 116
87 tv.tv_sec = (long)timeout; 117 tv.tv_sec = (long)timeout;
88 tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6); 118 tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6);
89 119
90 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);
91 121
92 if (res < 0) 122 if (res < 0)
93 { 123 {
124#ifdef WIN32
125 if (errno == WSAEINTR ) errno = EINTR;
126 if (errno == WSAENOTSOCK) errno = EBADF;
127#endif
128
94 if (errno == EBADF) 129 if (errno == EBADF)
95 fd_ebadf (EV_A); 130 fd_ebadf (EV_A);
96 else if (errno == ENOMEM && !syserr_cb) 131 else if (errno == ENOMEM && !syserr_cb)
97 fd_enomem (EV_A); 132 fd_enomem (EV_A);
98 else if (errno != EINTR) 133 else if (errno != EINTR)
99 syserr ("(libev) select"); 134 syserr ("(libev) select");
100 135
101 return; 136 return;
102 } 137 }
103 138
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)
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
104 for (word = vec_max; word--; ) 171 for (word = vec_max; word--; )
105 { 172 {
106 if (((uint32_t *)vec_ro) [word] | ((uint32_t *)vec_wo) [word]) 173 if (((uint32_t *)vec_ro) [word] | ((uint32_t *)vec_wo) [word])
107 for (offs = 4; offs--; ) 174 for (offs = 4; offs--; )
108 { 175 {
… …
121 if (events) 188 if (events)
122 fd_event (EV_A_ idx * 8 + bit, events); 189 fd_event (EV_A_ idx * 8 + bit, events);
123 } 190 }
124 } 191 }
125 } 192 }
193#endif
126} 194}
127 195
128static int 196static int
129select_init (EV_P_ int flags) 197select_init (EV_P_ int flags)
130{ 198{
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;
134 202
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
135 vec_max = 0; 210 vec_max = 0;
136 vec_ri = 0; 211 vec_ri = 0;
137 vec_ri = 0; 212 vec_ri = 0;
138 vec_wo = 0; 213 vec_wo = 0;
139 vec_wo = 0; 214 vec_wo = 0;
215#endif
140 216
141 return EVMETHOD_SELECT; 217 return EVMETHOD_SELECT;
142} 218}
143 219
144static void 220static void

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