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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 */ |
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33 | #ifdef WIN32 |
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34 | typedef unsigned int uint32_t; |
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35 | #else |
38 | #include <sys/select.h> |
36 | # include <sys/select.h> |
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37 | # include <inttypes.h> |
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38 | #endif |
39 | |
39 | |
40 | #include <string.h> |
40 | #include <string.h> |
41 | #include <inttypes.h> |
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42 | |
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43 | static unsigned char *vec_ri, *vec_ro, *vec_wi, *vec_wo; |
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44 | static int vec_max; |
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45 | |
41 | |
46 | static void |
42 | static void |
47 | select_modify (int fd, int oev, int nev) |
43 | select_modify (EV_P_ int fd, int oev, int nev) |
48 | { |
44 | { |
49 | int offs = fd >> 3; |
45 | int offs = fd >> 3; |
50 | int mask = 1 << (fd & 7); |
46 | int mask = 1 << (fd & 7); |
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47 | |
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48 | if (oev == nev) |
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49 | return; |
51 | |
50 | |
52 | if (vec_max < (fd >> 5) + 1) |
51 | if (vec_max < (fd >> 5) + 1) |
53 | { |
52 | { |
54 | int new_max = (fd >> 5) + 1; |
53 | int new_max = (fd >> 5) + 1; |
55 | |
54 | |
56 | vec_ri = (unsigned char *)realloc (vec_ri, new_max * 4); |
55 | vec_ri = (unsigned char *)ev_realloc (vec_ri, new_max * 4); |
57 | vec_ro = (unsigned char *)realloc (vec_ro, new_max * 4); /* could free/malloc */ |
56 | vec_ro = (unsigned char *)ev_realloc (vec_ro, new_max * 4); /* could free/malloc */ |
58 | vec_wi = (unsigned char *)realloc (vec_wi, new_max * 4); |
57 | vec_wi = (unsigned char *)ev_realloc (vec_wi, new_max * 4); |
59 | vec_wo = (unsigned char *)realloc (vec_wo, new_max * 4); /* could free/malloc */ |
58 | vec_wo = (unsigned char *)ev_realloc (vec_wo, new_max * 4); /* could free/malloc */ |
60 | |
59 | |
61 | for (; vec_max < new_max; ++vec_max) |
60 | for (; vec_max < new_max; ++vec_max) |
62 | ((uint32_t *)vec_ri)[vec_max] = |
61 | ((uint32_t *)vec_ri)[vec_max] = |
63 | ((uint32_t *)vec_wi)[vec_max] = 0; |
62 | ((uint32_t *)vec_wi)[vec_max] = 0; |
64 | } |
63 | } |
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71 | if (!(nev & EV_WRITE)) |
70 | if (!(nev & EV_WRITE)) |
72 | vec_wi [offs] &= ~mask; |
71 | vec_wi [offs] &= ~mask; |
73 | } |
72 | } |
74 | |
73 | |
75 | static void |
74 | static void |
76 | select_poll (ev_tstamp timeout) |
75 | select_poll (EV_P_ ev_tstamp timeout) |
77 | { |
76 | { |
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77 | int word, offs; |
78 | struct timeval tv; |
78 | struct timeval tv; |
79 | int res; |
79 | int res; |
80 | |
80 | |
81 | memcpy (vec_ro, vec_ri, vec_max * 4); |
81 | memcpy (vec_ro, vec_ri, vec_max * 4); |
82 | memcpy (vec_wo, vec_wi, vec_max * 4); |
82 | memcpy (vec_wo, vec_wi, vec_max * 4); |
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84 | tv.tv_sec = (long)timeout; |
84 | tv.tv_sec = (long)timeout; |
85 | tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6); |
85 | tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6); |
86 | |
86 | |
87 | res = select (vec_max * 32, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); |
87 | res = select (vec_max * 32, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); |
88 | |
88 | |
89 | if (res > 0) |
89 | if (res < 0) |
90 | { |
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91 | int word, offs; |
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92 | |
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93 | for (word = vec_max; word--; ) |
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94 | { |
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95 | if (((uint32_t *)vec_ro) [word] | ((uint32_t *)vec_wo) [word]) |
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96 | for (offs = 4; offs--; ) |
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97 | { |
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98 | int idx = word * 4 + offs; |
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99 | unsigned char byte_r = vec_ro [idx]; |
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100 | unsigned char byte_w = vec_wo [idx]; |
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101 | int bit; |
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102 | |
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103 | if (byte_r | byte_w) |
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104 | for (bit = 8; bit--; ) |
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105 | { |
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106 | int events = 0; |
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107 | events |= byte_r & (1 << bit) ? EV_READ : 0; |
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108 | events |= byte_w & (1 << bit) ? EV_WRITE : 0; |
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109 | |
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110 | if (events) |
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111 | fd_event (idx * 8 + bit, events); |
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112 | } |
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113 | } |
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114 | } |
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115 | } |
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116 | else if (res < 0) |
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117 | { |
90 | { |
118 | if (errno == EBADF) |
91 | if (errno == EBADF) |
119 | fd_recheck (); |
92 | fd_ebadf (EV_A); |
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93 | else if (errno == ENOMEM && !syserr_cb) |
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94 | fd_enomem (EV_A); |
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95 | else if (errno != EINTR) |
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96 | syserr ("(libev) select"); |
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97 | |
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98 | return; |
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99 | } |
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100 | |
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101 | for (word = vec_max; word--; ) |
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102 | { |
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103 | if (((uint32_t *)vec_ro) [word] | ((uint32_t *)vec_wo) [word]) |
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104 | for (offs = 4; offs--; ) |
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105 | { |
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106 | int idx = word * 4 + offs; |
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107 | unsigned char byte_r = vec_ro [idx]; |
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108 | unsigned char byte_w = vec_wo [idx]; |
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109 | int bit; |
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110 | |
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111 | if (byte_r | byte_w) |
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112 | for (bit = 8; bit--; ) |
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113 | { |
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114 | int events = 0; |
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115 | events |= byte_r & (1 << bit) ? EV_READ : 0; |
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116 | events |= byte_w & (1 << bit) ? EV_WRITE : 0; |
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117 | |
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118 | if (events) |
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119 | fd_event (EV_A_ idx * 8 + bit, events); |
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120 | } |
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121 | } |
120 | } |
122 | } |
121 | } |
123 | } |
122 | |
124 | |
123 | static void |
125 | static int |
124 | select_init (int flags) |
126 | select_init (EV_P_ int flags) |
125 | { |
127 | { |
126 | ev_method = EVMETHOD_SELECT; |
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127 | method_fudge = 1e-2; /* needed to compensate for select returning early, very conservative */ |
128 | method_fudge = 1e-2; /* needed to compensate for select returning early, very conservative */ |
128 | method_modify = select_modify; |
129 | method_modify = select_modify; |
129 | method_poll = select_poll; |
130 | method_poll = select_poll; |
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131 | |
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132 | vec_max = 0; |
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133 | vec_ri = 0; |
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134 | vec_ri = 0; |
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135 | vec_wo = 0; |
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136 | vec_wo = 0; |
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137 | |
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138 | return EVMETHOD_SELECT; |
130 | } |
139 | } |
131 | |
140 | |
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141 | static void |
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142 | select_destroy (EV_P) |
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143 | { |
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144 | ev_free (vec_ri); |
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145 | ev_free (vec_ro); |
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146 | ev_free (vec_wi); |
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147 | ev_free (vec_wo); |
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148 | } |
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149 | |
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150 | |