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