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1 | /* |
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2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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3 | * |
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4 | * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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5 | * |
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6 | * Deliantra is free software: you can redistribute it and/or modify |
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7 | * it under the terms of the GNU General Public License as published by |
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8 | * the Free Software Foundation, either version 3 of the License, or |
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9 | * (at your option) any later version. |
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10 | * |
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11 | * This program is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | * GNU General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU General Public License |
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17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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18 | * |
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19 | * The authors can be reached via e-mail to <support@deliantra.net> |
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20 | */ |
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21 | |
1 | #ifndef UTIL_H__ |
22 | #ifndef UTIL_H__ |
2 | #define UTIL_H__ |
23 | #define UTIL_H__ |
3 | |
24 | |
4 | //#define PREFER_MALLOC |
25 | #define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
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26 | #define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs |
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27 | #define PREFER_MALLOC 0 // use malloc and not the slice allocator |
5 | |
28 | |
6 | #if __GNUC__ >= 3 |
29 | #if __GNUC__ >= 3 |
7 | # define is_constant(c) __builtin_constant_p (c) |
30 | # define is_constant(c) __builtin_constant_p (c) |
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31 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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32 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
8 | #else |
33 | #else |
9 | # define is_constant(c) 0 |
34 | # define is_constant(c) 0 |
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35 | # define expect(expr,value) (expr) |
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36 | # define prefetch(addr,rw,locality) |
10 | #endif |
37 | #endif |
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38 | |
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39 | #if __GNUC__ < 4 || (__GNUC__ == 4 || __GNUC_MINOR__ < 4) |
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40 | # define decltype(x) typeof(x) |
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41 | #endif |
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42 | |
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43 | // put into ifs if you are very sure that the expression |
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44 | // is mostly true or mosty false. note that these return |
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45 | // booleans, not the expression. |
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46 | #define expect_false(expr) expect ((expr) != 0, 0) |
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47 | #define expect_true(expr) expect ((expr) != 0, 1) |
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48 | |
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49 | #include <pthread.h> |
11 | |
50 | |
12 | #include <cstddef> |
51 | #include <cstddef> |
13 | #include <cmath> |
52 | #include <cmath> |
14 | #include <new> |
53 | #include <new> |
15 | #include <vector> |
54 | #include <vector> |
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17 | #include <glib.h> |
56 | #include <glib.h> |
18 | |
57 | |
19 | #include <shstr.h> |
58 | #include <shstr.h> |
20 | #include <traits.h> |
59 | #include <traits.h> |
21 | |
60 | |
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61 | #if DEBUG_SALLOC |
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62 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
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63 | # define g_slice_alloc(s) debug_slice_alloc(s) |
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64 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
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65 | void *g_slice_alloc (unsigned long size); |
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66 | void *g_slice_alloc0 (unsigned long size); |
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67 | void g_slice_free1 (unsigned long size, void *ptr); |
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68 | #elif PREFER_MALLOC |
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69 | # define g_slice_alloc0(s) calloc (1, (s)) |
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70 | # define g_slice_alloc(s) malloc ((s)) |
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71 | # define g_slice_free1(s,p) free ((p)) |
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72 | #endif |
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73 | |
22 | // use a gcc extension for auto declarations until ISO C++ sanctifies them |
74 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
23 | #define AUTODECL(var,expr) typeof(expr) var = (expr) |
75 | #define auto(var,expr) decltype(expr) var = (expr) |
24 | |
76 | |
25 | // very ugly macro that basicaly declares and initialises a variable |
77 | // very ugly macro that basicaly declares and initialises a variable |
26 | // that is in scope for the next statement only |
78 | // that is in scope for the next statement only |
27 | // works only for stuff that can be assigned 0 and converts to false |
79 | // works only for stuff that can be assigned 0 and converts to false |
28 | // (note: works great for pointers) |
80 | // (note: works great for pointers) |
29 | // most ugly macro I ever wrote |
81 | // most ugly macro I ever wrote |
30 | #define declvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
82 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
31 | |
83 | |
32 | // in range including end |
84 | // in range including end |
33 | #define IN_RANGE_INC(val,beg,end) \ |
85 | #define IN_RANGE_INC(val,beg,end) \ |
34 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
86 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
35 | |
87 | |
36 | // in range excluding end |
88 | // in range excluding end |
37 | #define IN_RANGE_EXC(val,beg,end) \ |
89 | #define IN_RANGE_EXC(val,beg,end) \ |
38 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
90 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
39 | |
91 | |
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92 | void cleanup (const char *cause, bool make_core = false); |
40 | void fork_abort (const char *msg); |
93 | void fork_abort (const char *msg); |
41 | |
94 | |
42 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
95 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
43 | // as a is often a constant while b is the variable. it is still a bug, though. |
96 | // as a is often a constant while b is the variable. it is still a bug, though. |
44 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
97 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
45 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
98 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
46 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? (T)a : v >(T)b ? (T)b : v; } |
99 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? (T)a : v >(T)b ? (T)b : v; } |
47 | |
100 | |
48 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
101 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
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102 | |
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103 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
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104 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
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105 | |
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106 | template<typename T> |
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107 | static inline T |
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108 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
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109 | { |
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110 | return (val - min_in) * (max_out - min_out) / (max_in - min_in) + min_out; |
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111 | } |
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112 | |
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113 | // lots of stuff taken from FXT |
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114 | |
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115 | /* Rotate right. This is used in various places for checksumming */ |
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116 | //TODO: that sucks, use a better checksum algo |
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117 | static inline uint32_t |
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118 | rotate_right (uint32_t c, uint32_t count = 1) |
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119 | { |
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120 | return (c << (32 - count)) | (c >> count); |
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121 | } |
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122 | |
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123 | static inline uint32_t |
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124 | rotate_left (uint32_t c, uint32_t count = 1) |
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125 | { |
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126 | return (c >> (32 - count)) | (c << count); |
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127 | } |
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128 | |
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129 | // Return abs(a-b) |
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130 | // Both a and b must not have the most significant bit set |
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131 | static inline uint32_t |
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132 | upos_abs_diff (uint32_t a, uint32_t b) |
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133 | { |
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134 | long d1 = b - a; |
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135 | long d2 = (d1 & (d1 >> 31)) << 1; |
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136 | |
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137 | return d1 - d2; // == (b - d) - (a + d); |
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138 | } |
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139 | |
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140 | // Both a and b must not have the most significant bit set |
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141 | static inline uint32_t |
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142 | upos_min (uint32_t a, uint32_t b) |
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143 | { |
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144 | int32_t d = b - a; |
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145 | d &= d >> 31; |
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146 | return a + d; |
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147 | } |
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148 | |
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149 | // Both a and b must not have the most significant bit set |
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150 | static inline uint32_t |
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151 | upos_max (uint32_t a, uint32_t b) |
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152 | { |
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153 | int32_t d = b - a; |
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154 | d &= d >> 31; |
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155 | return b - d; |
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156 | } |
49 | |
157 | |
50 | // this is much faster than crossfires original algorithm |
158 | // this is much faster than crossfires original algorithm |
51 | // on modern cpus |
159 | // on modern cpus |
52 | inline int |
160 | inline int |
53 | isqrt (int n) |
161 | isqrt (int n) |
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85 | absdir (int d) |
193 | absdir (int d) |
86 | { |
194 | { |
87 | return ((d - 1) & 7) + 1; |
195 | return ((d - 1) & 7) + 1; |
88 | } |
196 | } |
89 | |
197 | |
90 | // makes dynamically allocated objects zero-initialised |
198 | extern ssize_t slice_alloc; // statistics |
91 | struct zero_initialised |
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92 | { |
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93 | void *operator new (size_t s, void *p) |
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94 | { |
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95 | memset (p, 0, s); |
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96 | return p; |
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97 | } |
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98 | |
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99 | void *operator new (size_t s) |
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100 | { |
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101 | return g_slice_alloc0 (s); |
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102 | } |
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103 | |
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104 | void *operator new[] (size_t s) |
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105 | { |
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106 | return g_slice_alloc0 (s); |
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107 | } |
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108 | |
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109 | void operator delete (void *p, size_t s) |
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110 | { |
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111 | g_slice_free1 (s, p); |
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112 | } |
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113 | |
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114 | void operator delete[] (void *p, size_t s) |
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115 | { |
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116 | g_slice_free1 (s, p); |
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117 | } |
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118 | }; |
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119 | |
199 | |
120 | void *salloc_ (int n) throw (std::bad_alloc); |
200 | void *salloc_ (int n) throw (std::bad_alloc); |
121 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
201 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
122 | |
202 | |
123 | // strictly the same as g_slice_alloc, but never returns 0 |
203 | // strictly the same as g_slice_alloc, but never returns 0 |
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135 | |
215 | |
136 | // for symmetry |
216 | // for symmetry |
137 | template<typename T> |
217 | template<typename T> |
138 | inline void sfree (T *ptr, int n = 1) throw () |
218 | inline void sfree (T *ptr, int n = 1) throw () |
139 | { |
219 | { |
140 | #ifdef PREFER_MALLOC |
220 | if (expect_true (ptr)) |
141 | free (ptr); |
221 | { |
142 | #else |
222 | slice_alloc -= n * sizeof (T); |
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223 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
143 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
224 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
144 | #endif |
225 | assert (slice_alloc >= 0);//D |
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226 | } |
145 | } |
227 | } |
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228 | |
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229 | // nulls the pointer |
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230 | template<typename T> |
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231 | inline void sfree0 (T *&ptr, int n = 1) throw () |
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232 | { |
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233 | sfree<T> (ptr, n); |
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234 | ptr = 0; |
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235 | } |
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236 | |
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237 | // makes dynamically allocated objects zero-initialised |
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238 | struct zero_initialised |
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239 | { |
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240 | void *operator new (size_t s, void *p) |
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241 | { |
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242 | memset (p, 0, s); |
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243 | return p; |
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244 | } |
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245 | |
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246 | void *operator new (size_t s) |
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247 | { |
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248 | return salloc0<char> (s); |
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249 | } |
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250 | |
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251 | void *operator new[] (size_t s) |
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252 | { |
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253 | return salloc0<char> (s); |
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254 | } |
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255 | |
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256 | void operator delete (void *p, size_t s) |
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257 | { |
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258 | sfree ((char *)p, s); |
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259 | } |
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260 | |
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261 | void operator delete[] (void *p, size_t s) |
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262 | { |
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263 | sfree ((char *)p, s); |
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264 | } |
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265 | }; |
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266 | |
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267 | // makes dynamically allocated objects zero-initialised |
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268 | struct slice_allocated |
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269 | { |
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270 | void *operator new (size_t s, void *p) |
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271 | { |
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272 | return p; |
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273 | } |
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274 | |
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275 | void *operator new (size_t s) |
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276 | { |
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277 | return salloc<char> (s); |
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278 | } |
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279 | |
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280 | void *operator new[] (size_t s) |
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281 | { |
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282 | return salloc<char> (s); |
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283 | } |
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284 | |
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285 | void operator delete (void *p, size_t s) |
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286 | { |
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287 | sfree ((char *)p, s); |
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288 | } |
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289 | |
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290 | void operator delete[] (void *p, size_t s) |
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291 | { |
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292 | sfree ((char *)p, s); |
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293 | } |
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294 | }; |
146 | |
295 | |
147 | // a STL-compatible allocator that uses g_slice |
296 | // a STL-compatible allocator that uses g_slice |
148 | // boy, this is verbose |
297 | // boy, this is verbose |
149 | template<typename Tp> |
298 | template<typename Tp> |
150 | struct slice_allocator |
299 | struct slice_allocator |
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162 | { |
311 | { |
163 | typedef slice_allocator<U> other; |
312 | typedef slice_allocator<U> other; |
164 | }; |
313 | }; |
165 | |
314 | |
166 | slice_allocator () throw () { } |
315 | slice_allocator () throw () { } |
167 | slice_allocator (const slice_allocator &o) throw () { } |
316 | slice_allocator (const slice_allocator &) throw () { } |
168 | template<typename Tp2> |
317 | template<typename Tp2> |
169 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
318 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
170 | |
319 | |
171 | ~slice_allocator () { } |
320 | ~slice_allocator () { } |
172 | |
321 | |
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181 | void deallocate (pointer p, size_type n) |
330 | void deallocate (pointer p, size_type n) |
182 | { |
331 | { |
183 | sfree<Tp> (p, n); |
332 | sfree<Tp> (p, n); |
184 | } |
333 | } |
185 | |
334 | |
186 | size_type max_size ()const throw () |
335 | size_type max_size () const throw () |
187 | { |
336 | { |
188 | return size_t (-1) / sizeof (Tp); |
337 | return size_t (-1) / sizeof (Tp); |
189 | } |
338 | } |
190 | |
339 | |
191 | void construct (pointer p, const Tp &val) |
340 | void construct (pointer p, const Tp &val) |
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216 | } |
365 | } |
217 | |
366 | |
218 | void seed (uint32_t seed); |
367 | void seed (uint32_t seed); |
219 | uint32_t next (); |
368 | uint32_t next (); |
220 | |
369 | |
221 | // uniform distribution |
370 | // uniform distribution, 0 .. max (0, num - 1) |
222 | uint32_t operator ()(uint32_t r_max) |
371 | uint32_t operator ()(uint32_t num) |
223 | { |
372 | { |
224 | return is_constant (r_max) |
373 | return is_constant (num) |
225 | ? this->next () % r_max |
374 | ? (next () * (uint64_t)num) >> 32U |
226 | : get_range (r_max); |
375 | : get_range (num); |
227 | } |
376 | } |
228 | |
377 | |
229 | // return a number within (min .. max) |
378 | // return a number within (min .. max) |
230 | int operator () (int r_min, int r_max) |
379 | int operator () (int r_min, int r_max) |
231 | { |
380 | { |
232 | return is_constant (r_min) && is_constant (r_max) |
381 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
233 | ? r_min + (*this) (max (r_max - r_min + 1, 1)) |
382 | ? r_min + operator ()(r_max - r_min + 1) |
234 | : get_range (r_min, r_max); |
383 | : get_range (r_min, r_max); |
235 | } |
384 | } |
236 | |
385 | |
237 | double operator ()() |
386 | double operator ()() |
238 | { |
387 | { |
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244 | int get_range (int r_min, int r_max); |
393 | int get_range (int r_min, int r_max); |
245 | }; |
394 | }; |
246 | |
395 | |
247 | typedef tausworthe_random_generator rand_gen; |
396 | typedef tausworthe_random_generator rand_gen; |
248 | |
397 | |
249 | extern rand_gen rndm; |
398 | extern rand_gen rndm, rmg_rndm; |
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399 | |
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400 | INTERFACE_CLASS (attachable) |
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401 | struct refcnt_base |
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402 | { |
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403 | typedef int refcnt_t; |
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404 | mutable refcnt_t ACC (RW, refcnt); |
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405 | |
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406 | MTH void refcnt_inc () const { ++refcnt; } |
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407 | MTH void refcnt_dec () const { --refcnt; } |
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408 | |
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409 | refcnt_base () : refcnt (0) { } |
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410 | }; |
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411 | |
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412 | // to avoid branches with more advanced compilers |
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413 | extern refcnt_base::refcnt_t refcnt_dummy; |
250 | |
414 | |
251 | template<class T> |
415 | template<class T> |
252 | struct refptr |
416 | struct refptr |
253 | { |
417 | { |
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418 | // p if not null |
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419 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
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420 | |
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421 | void refcnt_dec () |
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422 | { |
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423 | if (!is_constant (p)) |
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424 | --*refcnt_ref (); |
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425 | else if (p) |
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426 | --p->refcnt; |
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427 | } |
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428 | |
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429 | void refcnt_inc () |
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430 | { |
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431 | if (!is_constant (p)) |
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432 | ++*refcnt_ref (); |
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433 | else if (p) |
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434 | ++p->refcnt; |
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435 | } |
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436 | |
254 | T *p; |
437 | T *p; |
255 | |
438 | |
256 | refptr () : p(0) { } |
439 | refptr () : p(0) { } |
257 | refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); } |
440 | refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
258 | refptr (T *p) : p(p) { if (p) p->refcnt_inc (); } |
441 | refptr (T *p) : p(p) { refcnt_inc (); } |
259 | ~refptr () { if (p) p->refcnt_dec (); } |
442 | ~refptr () { refcnt_dec (); } |
260 | |
443 | |
261 | const refptr<T> &operator =(T *o) |
444 | const refptr<T> &operator =(T *o) |
262 | { |
445 | { |
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446 | // if decrementing ever destroys we need to reverse the order here |
263 | if (p) p->refcnt_dec (); |
447 | refcnt_dec (); |
264 | p = o; |
448 | p = o; |
265 | if (p) p->refcnt_inc (); |
449 | refcnt_inc (); |
266 | |
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267 | return *this; |
450 | return *this; |
268 | } |
451 | } |
269 | |
452 | |
270 | const refptr<T> &operator =(const refptr<T> o) |
453 | const refptr<T> &operator =(const refptr<T> &o) |
271 | { |
454 | { |
272 | *this = o.p; |
455 | *this = o.p; |
273 | return *this; |
456 | return *this; |
274 | } |
457 | } |
275 | |
458 | |
276 | T &operator * () const { return *p; } |
459 | T &operator * () const { return *p; } |
277 | T *operator ->() const { return p; } |
460 | T *operator ->() const { return p; } |
278 | |
461 | |
279 | operator T *() const { return p; } |
462 | operator T *() const { return p; } |
280 | }; |
463 | }; |
281 | |
464 | |
282 | typedef refptr<maptile> maptile_ptr; |
465 | typedef refptr<maptile> maptile_ptr; |
… | |
… | |
317 | { |
500 | { |
318 | return !strcmp (a, b); |
501 | return !strcmp (a, b); |
319 | } |
502 | } |
320 | }; |
503 | }; |
321 | |
504 | |
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505 | // Mostly the same as std::vector, but insert/erase can reorder |
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506 | // the elements, making append(=insert)/remove O(1) instead of O(n). |
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507 | // |
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508 | // NOTE: only some forms of erase are available |
322 | template<class T> |
509 | template<class T> |
323 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
510 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
324 | { |
511 | { |
325 | typedef typename unordered_vector::iterator iterator; |
512 | typedef typename unordered_vector::iterator iterator; |
326 | |
513 | |
… | |
… | |
336 | { |
523 | { |
337 | erase ((unsigned int )(i - this->begin ())); |
524 | erase ((unsigned int )(i - this->begin ())); |
338 | } |
525 | } |
339 | }; |
526 | }; |
340 | |
527 | |
341 | template<class T, int T::* index> |
528 | // This container blends advantages of linked lists |
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529 | // (efficiency) with vectors (random access) by |
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530 | // by using an unordered vector and storing the vector |
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531 | // index inside the object. |
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532 | // |
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533 | // + memory-efficient on most 64 bit archs |
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534 | // + O(1) insert/remove |
|
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535 | // + free unique (but varying) id for inserted objects |
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536 | // + cache-friendly iteration |
|
|
537 | // - only works for pointers to structs |
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538 | // |
|
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539 | // NOTE: only some forms of erase/insert are available |
|
|
540 | typedef int object_vector_index; |
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541 | |
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542 | template<class T, object_vector_index T::*indexmember> |
342 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
543 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
343 | { |
544 | { |
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545 | typedef typename object_vector::iterator iterator; |
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546 | |
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547 | bool contains (const T *obj) const |
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548 | { |
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549 | return obj->*indexmember; |
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550 | } |
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551 | |
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552 | iterator find (const T *obj) |
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553 | { |
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554 | return obj->*indexmember |
|
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555 | ? this->begin () + obj->*indexmember - 1 |
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556 | : this->end (); |
|
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557 | } |
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558 | |
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559 | void push_back (T *obj) |
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560 | { |
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561 | std::vector<T *, slice_allocator<T *> >::push_back (obj); |
|
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562 | obj->*indexmember = this->size (); |
|
|
563 | } |
|
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564 | |
344 | void insert (T *obj) |
565 | void insert (T *obj) |
345 | { |
566 | { |
346 | assert (!(obj->*index)); |
|
|
347 | push_back (obj); |
567 | push_back (obj); |
348 | obj->*index = this->size (); |
|
|
349 | } |
568 | } |
350 | |
569 | |
351 | void insert (T &obj) |
570 | void insert (T &obj) |
352 | { |
571 | { |
353 | insert (&obj); |
572 | insert (&obj); |
354 | } |
573 | } |
355 | |
574 | |
356 | void erase (T *obj) |
575 | void erase (T *obj) |
357 | { |
576 | { |
358 | assert (obj->*index); |
|
|
359 | int pos = obj->*index; |
577 | unsigned int pos = obj->*indexmember; |
360 | obj->*index = 0; |
578 | obj->*indexmember = 0; |
361 | |
579 | |
362 | if (pos < this->size ()) |
580 | if (pos < this->size ()) |
363 | { |
581 | { |
364 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
582 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
365 | (*this)[pos - 1]->*index = pos; |
583 | (*this)[pos - 1]->*indexmember = pos; |
366 | } |
584 | } |
367 | |
585 | |
368 | this->pop_back (); |
586 | this->pop_back (); |
369 | } |
587 | } |
370 | |
588 | |
371 | void erase (T &obj) |
589 | void erase (T &obj) |
372 | { |
590 | { |
373 | errase (&obj); |
591 | erase (&obj); |
374 | } |
592 | } |
375 | }; |
593 | }; |
376 | |
594 | |
377 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
595 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
378 | void assign (char *dst, const char *src, int maxlen); |
596 | void assign (char *dst, const char *src, int maxlen); |
… | |
… | |
384 | assign ((char *)&dst, src, N); |
602 | assign ((char *)&dst, src, N); |
385 | } |
603 | } |
386 | |
604 | |
387 | typedef double tstamp; |
605 | typedef double tstamp; |
388 | |
606 | |
389 | // return current time as timestampe |
607 | // return current time as timestamp |
390 | tstamp now (); |
608 | tstamp now (); |
391 | |
609 | |
392 | int similar_direction (int a, int b); |
610 | int similar_direction (int a, int b); |
393 | |
611 | |
|
|
612 | // like sprintf, but returns a "static" buffer |
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|
613 | const char *format (const char *format, ...); |
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614 | |
|
|
615 | ///////////////////////////////////////////////////////////////////////////// |
|
|
616 | // threads, very very thin wrappers around pthreads |
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617 | |
|
|
618 | struct thread |
|
|
619 | { |
|
|
620 | pthread_t id; |
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621 | |
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|
622 | void start (void *(*start_routine)(void *), void *arg = 0); |
|
|
623 | |
|
|
624 | void cancel () |
|
|
625 | { |
|
|
626 | pthread_cancel (id); |
|
|
627 | } |
|
|
628 | |
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|
629 | void *join () |
|
|
630 | { |
|
|
631 | void *ret; |
|
|
632 | |
|
|
633 | if (pthread_join (id, &ret)) |
|
|
634 | cleanup ("pthread_join failed", 1); |
|
|
635 | |
|
|
636 | return ret; |
|
|
637 | } |
|
|
638 | }; |
|
|
639 | |
|
|
640 | // note that mutexes are not classes |
|
|
641 | typedef pthread_mutex_t smutex; |
|
|
642 | |
|
|
643 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
|
|
644 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
|
|
645 | #else |
|
|
646 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
394 | #endif |
647 | #endif |
395 | |
648 | |
|
|
649 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
|
|
650 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
|
|
651 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
|
|
652 | |
|
|
653 | typedef pthread_cond_t scond; |
|
|
654 | |
|
|
655 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
|
|
656 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
|
|
657 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
|
|
658 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
|
|
659 | |
|
|
660 | #endif |
|
|
661 | |