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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 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 | |
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25 | #define DEBUG_SALLOC 0 |
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26 | #define PREFER_MALLOC 0 |
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27 | |
| 4 | #if __GNUC__ >= 3 |
28 | #if __GNUC__ >= 3 |
| 5 | # define is_constant(c) __builtin_constant_p (c) |
29 | # define is_constant(c) __builtin_constant_p (c) |
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30 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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31 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
| 6 | #else |
32 | #else |
| 7 | # define is_constant(c) 0 |
33 | # define is_constant(c) 0 |
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34 | # define expect(expr,value) (expr) |
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35 | # define prefetch(addr,rw,locality) |
| 8 | #endif |
36 | #endif |
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37 | |
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38 | #if __GNUC__ < 4 || (__GNUC__ == 4 || __GNUC_MINOR__ < 4) |
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39 | # define decltype(x) typeof(x) |
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40 | #endif |
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41 | |
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42 | // put into ifs if you are very sure that the expression |
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43 | // is mostly true or mosty false. note that these return |
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44 | // booleans, not the expression. |
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45 | #define expect_false(expr) expect ((expr) != 0, 0) |
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46 | #define expect_true(expr) expect ((expr) != 0, 1) |
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47 | |
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48 | #include <pthread.h> |
| 9 | |
49 | |
| 10 | #include <cstddef> |
50 | #include <cstddef> |
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51 | #include <cmath> |
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52 | #include <new> |
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53 | #include <vector> |
| 11 | |
54 | |
| 12 | #include <glib.h> |
55 | #include <glib.h> |
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56 | |
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57 | #include <shstr.h> |
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58 | #include <traits.h> |
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59 | |
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60 | #if DEBUG_SALLOC |
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61 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
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62 | # define g_slice_alloc(s) debug_slice_alloc(s) |
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63 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
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64 | void *g_slice_alloc (unsigned long size); |
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65 | void *g_slice_alloc0 (unsigned long size); |
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66 | void g_slice_free1 (unsigned long size, void *ptr); |
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67 | #endif |
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68 | |
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69 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
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70 | #define auto(var,expr) decltype(expr) var = (expr) |
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71 | |
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72 | // very ugly macro that basicaly declares and initialises a variable |
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73 | // that is in scope for the next statement only |
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74 | // works only for stuff that can be assigned 0 and converts to false |
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75 | // (note: works great for pointers) |
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76 | // most ugly macro I ever wrote |
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77 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
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78 | |
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79 | // in range including end |
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80 | #define IN_RANGE_INC(val,beg,end) \ |
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81 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
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82 | |
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83 | // in range excluding end |
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84 | #define IN_RANGE_EXC(val,beg,end) \ |
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85 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
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86 | |
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87 | void cleanup (const char *cause, bool make_core = false); |
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88 | void fork_abort (const char *msg); |
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89 | |
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90 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
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91 | // as a is often a constant while b is the variable. it is still a bug, though. |
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92 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
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93 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
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94 | 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; } |
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95 | |
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96 | 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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97 | |
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98 | 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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99 | 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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100 | |
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101 | template<typename T> |
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102 | static inline T |
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103 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
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104 | { |
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105 | return (val - min_in) * (max_out - min_out) / (max_in - min_in) + min_out; |
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106 | } |
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107 | |
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108 | // lots of stuff taken from FXT |
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109 | |
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110 | /* Rotate right. This is used in various places for checksumming */ |
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111 | //TODO: that sucks, use a better checksum algo |
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112 | static inline uint32_t |
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113 | rotate_right (uint32_t c, uint32_t count = 1) |
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114 | { |
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115 | return (c << (32 - count)) | (c >> count); |
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116 | } |
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117 | |
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118 | static inline uint32_t |
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119 | rotate_left (uint32_t c, uint32_t count = 1) |
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120 | { |
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121 | return (c >> (32 - count)) | (c << count); |
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122 | } |
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123 | |
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124 | // Return abs(a-b) |
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125 | // Both a and b must not have the most significant bit set |
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126 | static inline uint32_t |
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127 | upos_abs_diff (uint32_t a, uint32_t b) |
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128 | { |
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129 | long d1 = b - a; |
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130 | long d2 = (d1 & (d1 >> 31)) << 1; |
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131 | |
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132 | return d1 - d2; // == (b - d) - (a + d); |
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133 | } |
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134 | |
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135 | // Both a and b must not have the most significant bit set |
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136 | static inline uint32_t |
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137 | upos_min (uint32_t a, uint32_t b) |
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138 | { |
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139 | int32_t d = b - a; |
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140 | d &= d >> 31; |
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141 | return a + d; |
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142 | } |
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143 | |
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144 | // Both a and b must not have the most significant bit set |
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145 | static inline uint32_t |
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146 | upos_max (uint32_t a, uint32_t b) |
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147 | { |
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148 | int32_t d = b - a; |
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149 | d &= d >> 31; |
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150 | return b - d; |
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151 | } |
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152 | |
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153 | // this is much faster than crossfires original algorithm |
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154 | // on modern cpus |
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155 | inline int |
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156 | isqrt (int n) |
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157 | { |
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158 | return (int)sqrtf ((float)n); |
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159 | } |
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160 | |
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161 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
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162 | #if 0 |
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163 | // and has a max. error of 6 in the range -100..+100. |
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164 | #else |
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165 | // and has a max. error of 9 in the range -100..+100. |
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166 | #endif |
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167 | inline int |
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168 | idistance (int dx, int dy) |
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169 | { |
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170 | unsigned int dx_ = abs (dx); |
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171 | unsigned int dy_ = abs (dy); |
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172 | |
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173 | #if 0 |
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174 | return dx_ > dy_ |
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175 | ? (dx_ * 61685 + dy_ * 26870) >> 16 |
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176 | : (dy_ * 61685 + dx_ * 26870) >> 16; |
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177 | #else |
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178 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
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179 | #endif |
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180 | } |
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181 | |
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182 | /* |
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183 | * absdir(int): Returns a number between 1 and 8, which represent |
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184 | * the "absolute" direction of a number (it actually takes care of |
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185 | * "overflow" in previous calculations of a direction). |
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186 | */ |
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187 | inline int |
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188 | absdir (int d) |
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189 | { |
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190 | return ((d - 1) & 7) + 1; |
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191 | } |
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192 | |
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193 | extern size_t slice_alloc; // statistics |
| 13 | |
194 | |
| 14 | // makes dynamically allocated objects zero-initialised |
195 | // makes dynamically allocated objects zero-initialised |
| 15 | struct zero_initialised |
196 | struct zero_initialised |
| 16 | { |
197 | { |
| 17 | void *operator new (size_t s, void *p) |
198 | void *operator new (size_t s, void *p) |
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… | |
| 20 | return p; |
201 | return p; |
| 21 | } |
202 | } |
| 22 | |
203 | |
| 23 | void *operator new (size_t s) |
204 | void *operator new (size_t s) |
| 24 | { |
205 | { |
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206 | slice_alloc += s; |
| 25 | return g_slice_alloc0 (s); |
207 | return g_slice_alloc0 (s); |
| 26 | } |
208 | } |
| 27 | |
209 | |
| 28 | void *operator new[] (size_t s) |
210 | void *operator new[] (size_t s) |
| 29 | { |
211 | { |
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212 | slice_alloc += s; |
| 30 | return g_slice_alloc0 (s); |
213 | return g_slice_alloc0 (s); |
| 31 | } |
214 | } |
| 32 | |
215 | |
| 33 | void operator delete (void *p, size_t s) |
216 | void operator delete (void *p, size_t s) |
| 34 | { |
217 | { |
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218 | slice_alloc -= s; |
| 35 | g_slice_free1 (s, p); |
219 | g_slice_free1 (s, p); |
| 36 | } |
220 | } |
| 37 | |
221 | |
| 38 | void operator delete[] (void *p, size_t s) |
222 | void operator delete[] (void *p, size_t s) |
| 39 | { |
223 | { |
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224 | slice_alloc -= s; |
| 40 | g_slice_free1 (s, p); |
225 | g_slice_free1 (s, p); |
| 41 | } |
226 | } |
| 42 | }; |
227 | }; |
| 43 | |
228 | |
| 44 | void throw_bad_alloc () throw (std::bad_alloc); |
229 | void *salloc_ (int n) throw (std::bad_alloc); |
| 45 | |
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| 46 | void *alloc (int s) throw (std::bad_alloc); |
230 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
| 47 | void dealloc (void *p, int s) throw (); |
231 | |
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232 | // strictly the same as g_slice_alloc, but never returns 0 |
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233 | template<typename T> |
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234 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
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235 | |
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236 | // also copies src into the new area, like "memdup" |
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237 | // if src is 0, clears the memory |
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238 | template<typename T> |
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239 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
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240 | |
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241 | // clears the memory |
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242 | template<typename T> |
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243 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
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244 | |
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245 | // for symmetry |
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246 | template<typename T> |
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247 | inline void sfree (T *ptr, int n = 1) throw () |
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248 | { |
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249 | #if PREFER_MALLOC |
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250 | free (ptr); |
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251 | #else |
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252 | slice_alloc -= n * sizeof (T); |
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253 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
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254 | #endif |
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255 | } |
| 48 | |
256 | |
| 49 | // a STL-compatible allocator that uses g_slice |
257 | // a STL-compatible allocator that uses g_slice |
| 50 | // boy, this is verbose |
258 | // boy, this is verbose |
| 51 | template<typename Tp> |
259 | template<typename Tp> |
| 52 | struct slice_allocator |
260 | struct slice_allocator |
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… | |
| 64 | { |
272 | { |
| 65 | typedef slice_allocator<U> other; |
273 | typedef slice_allocator<U> other; |
| 66 | }; |
274 | }; |
| 67 | |
275 | |
| 68 | slice_allocator () throw () { } |
276 | slice_allocator () throw () { } |
| 69 | slice_allocator (const slice_allocator &o) throw () { } |
277 | slice_allocator (const slice_allocator &) throw () { } |
| 70 | template<typename Tp2> |
278 | template<typename Tp2> |
| 71 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
279 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
| 72 | |
280 | |
| 73 | ~slice_allocator () { } |
281 | ~slice_allocator () { } |
| 74 | |
282 | |
| 75 | pointer address (reference x) const { return &x; } |
283 | pointer address (reference x) const { return &x; } |
| 76 | const_pointer address (const_reference x) const { return &x; } |
284 | const_pointer address (const_reference x) const { return &x; } |
| 77 | |
285 | |
| 78 | pointer allocate (size_type n, const_pointer = 0) |
286 | pointer allocate (size_type n, const_pointer = 0) |
| 79 | { |
287 | { |
| 80 | return static_cast<pointer>(alloc (n * sizeof (Tp))); |
288 | return salloc<Tp> (n); |
| 81 | } |
289 | } |
| 82 | |
290 | |
| 83 | void deallocate (pointer p, size_type n) |
291 | void deallocate (pointer p, size_type n) |
| 84 | { |
292 | { |
| 85 | dealloc (static_cast<void *>(p), n); |
293 | sfree<Tp> (p, n); |
| 86 | } |
294 | } |
| 87 | |
295 | |
| 88 | size_type max_size ()const throw () |
296 | size_type max_size () const throw () |
| 89 | { |
297 | { |
| 90 | return size_t (-1) / sizeof (Tp); |
298 | return size_t (-1) / sizeof (Tp); |
| 91 | } |
299 | } |
| 92 | |
300 | |
| 93 | void construct (pointer p, const Tp &val) |
301 | void construct (pointer p, const Tp &val) |
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… | |
| 99 | { |
307 | { |
| 100 | p->~Tp (); |
308 | p->~Tp (); |
| 101 | } |
309 | } |
| 102 | }; |
310 | }; |
| 103 | |
311 | |
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312 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
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313 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
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314 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
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315 | struct tausworthe_random_generator |
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316 | { |
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317 | // generator |
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318 | uint32_t state [4]; |
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319 | |
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320 | void operator =(const tausworthe_random_generator &src) |
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321 | { |
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322 | state [0] = src.state [0]; |
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323 | state [1] = src.state [1]; |
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324 | state [2] = src.state [2]; |
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325 | state [3] = src.state [3]; |
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326 | } |
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327 | |
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328 | void seed (uint32_t seed); |
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329 | uint32_t next (); |
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330 | |
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331 | // uniform distribution |
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332 | uint32_t operator ()(uint32_t num) |
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333 | { |
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334 | return is_constant (num) |
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335 | ? (next () * (uint64_t)num) >> 32U |
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336 | : get_range (num); |
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337 | } |
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338 | |
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339 | // return a number within (min .. max) |
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340 | int operator () (int r_min, int r_max) |
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341 | { |
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342 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
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343 | ? r_min + operator ()(r_max - r_min + 1) |
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344 | : get_range (r_min, r_max); |
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345 | } |
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346 | |
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347 | double operator ()() |
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348 | { |
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349 | return this->next () / (double)0xFFFFFFFFU; |
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350 | } |
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351 | |
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352 | protected: |
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353 | uint32_t get_range (uint32_t r_max); |
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354 | int get_range (int r_min, int r_max); |
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355 | }; |
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356 | |
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357 | typedef tausworthe_random_generator rand_gen; |
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358 | |
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359 | extern rand_gen rndm; |
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360 | |
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361 | INTERFACE_CLASS (attachable) |
| 104 | struct refcounted |
362 | struct refcnt_base |
| 105 | { |
363 | { |
| 106 | mutable int refcnt; |
364 | typedef int refcnt_t; |
| 107 | refcounted () : refcnt (0) { } |
365 | mutable refcnt_t ACC (RW, refcnt); |
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366 | |
| 108 | void refcnt_inc () { ++refcnt; } |
367 | MTH void refcnt_inc () const { ++refcnt; } |
| 109 | void refcnt_dec () { --refcnt; |
368 | MTH void refcnt_dec () const { --refcnt; } |
| 110 | if (refcnt < 0)abort();}//D |
369 | |
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370 | refcnt_base () : refcnt (0) { } |
| 111 | }; |
371 | }; |
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372 | |
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373 | // to avoid branches with more advanced compilers |
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374 | extern refcnt_base::refcnt_t refcnt_dummy; |
| 112 | |
375 | |
| 113 | template<class T> |
376 | template<class T> |
| 114 | struct refptr |
377 | struct refptr |
| 115 | { |
378 | { |
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379 | // p if not null |
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380 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
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381 | |
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382 | void refcnt_dec () |
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383 | { |
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384 | if (!is_constant (p)) |
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385 | --*refcnt_ref (); |
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386 | else if (p) |
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387 | --p->refcnt; |
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388 | } |
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389 | |
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390 | void refcnt_inc () |
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391 | { |
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392 | if (!is_constant (p)) |
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393 | ++*refcnt_ref (); |
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394 | else if (p) |
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395 | ++p->refcnt; |
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396 | } |
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397 | |
| 116 | T *p; |
398 | T *p; |
| 117 | |
399 | |
| 118 | refptr () : p(0) { } |
400 | refptr () : p(0) { } |
| 119 | refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); } |
401 | refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
| 120 | refptr (T *p) : p(p) { if (p) p->refcnt_inc (); } |
402 | refptr (T *p) : p(p) { refcnt_inc (); } |
| 121 | ~refptr () { if (p) p->refcnt_dec (); } |
403 | ~refptr () { refcnt_dec (); } |
| 122 | |
404 | |
| 123 | const refptr<T> &operator =(T *o) |
405 | const refptr<T> &operator =(T *o) |
| 124 | { |
406 | { |
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407 | // if decrementing ever destroys we need to reverse the order here |
| 125 | if (p) p->refcnt_dec (); |
408 | refcnt_dec (); |
| 126 | p = o; |
409 | p = o; |
| 127 | if (p) p->refcnt_inc (); |
410 | refcnt_inc (); |
| 128 | |
|
|
| 129 | return *this; |
411 | return *this; |
| 130 | } |
412 | } |
| 131 | |
413 | |
| 132 | const refptr<T> &operator =(const refptr<T> o) |
414 | const refptr<T> &operator =(const refptr<T> &o) |
| 133 | { |
415 | { |
| 134 | *this = o.p; |
416 | *this = o.p; |
| 135 | return *this; |
417 | return *this; |
| 136 | } |
418 | } |
| 137 | |
419 | |
| 138 | T &operator * () const { return *p; } |
420 | T &operator * () const { return *p; } |
| 139 | T *operator ->() const { return p; } |
421 | T *operator ->() const { return p; } |
| 140 | |
422 | |
| 141 | operator T *() const { return p; } |
423 | operator T *() const { return p; } |
| 142 | }; |
424 | }; |
|
|
425 | |
|
|
426 | typedef refptr<maptile> maptile_ptr; |
|
|
427 | typedef refptr<object> object_ptr; |
|
|
428 | typedef refptr<archetype> arch_ptr; |
|
|
429 | typedef refptr<client> client_ptr; |
|
|
430 | typedef refptr<player> player_ptr; |
| 143 | |
431 | |
| 144 | struct str_hash |
432 | struct str_hash |
| 145 | { |
433 | { |
| 146 | std::size_t operator ()(const char *s) const |
434 | std::size_t operator ()(const char *s) const |
| 147 | { |
435 | { |
| … | |
… | |
| 173 | { |
461 | { |
| 174 | return !strcmp (a, b); |
462 | return !strcmp (a, b); |
| 175 | } |
463 | } |
| 176 | }; |
464 | }; |
| 177 | |
465 | |
| 178 | #include <vector> |
466 | // Mostly the same as std::vector, but insert/erase can reorder |
| 179 | |
467 | // the elements, making append(=insert)/remove O(1) instead of O(n). |
|
|
468 | // |
|
|
469 | // NOTE: only some forms of erase are available |
| 180 | template<class obj> |
470 | template<class T> |
| 181 | struct unordered_vector : std::vector<obj, slice_allocator<obj> > |
471 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
| 182 | { |
472 | { |
| 183 | typedef typename unordered_vector::iterator iterator; |
473 | typedef typename unordered_vector::iterator iterator; |
| 184 | |
474 | |
| 185 | void erase (unsigned int pos) |
475 | void erase (unsigned int pos) |
| 186 | { |
476 | { |
| … | |
… | |
| 194 | { |
484 | { |
| 195 | erase ((unsigned int )(i - this->begin ())); |
485 | erase ((unsigned int )(i - this->begin ())); |
| 196 | } |
486 | } |
| 197 | }; |
487 | }; |
| 198 | |
488 | |
| 199 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
489 | // This container blends advantages of linked lists |
| 200 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
490 | // (efficiency) with vectors (random access) by |
| 201 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
491 | // by using an unordered vector and storing the vector |
|
|
492 | // index inside the object. |
|
|
493 | // |
|
|
494 | // + memory-efficient on most 64 bit archs |
|
|
495 | // + O(1) insert/remove |
|
|
496 | // + free unique (but varying) id for inserted objects |
|
|
497 | // + cache-friendly iteration |
|
|
498 | // - only works for pointers to structs |
|
|
499 | // |
|
|
500 | // NOTE: only some forms of erase/insert are available |
|
|
501 | typedef int object_vector_index; |
| 202 | |
502 | |
| 203 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
503 | template<class T, object_vector_index T::*indexmember> |
|
|
504 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
|
|
505 | { |
|
|
506 | typedef typename object_vector::iterator iterator; |
|
|
507 | |
|
|
508 | bool contains (const T *obj) const |
|
|
509 | { |
|
|
510 | return obj->*indexmember; |
|
|
511 | } |
|
|
512 | |
|
|
513 | iterator find (const T *obj) |
|
|
514 | { |
|
|
515 | return obj->*indexmember |
|
|
516 | ? this->begin () + obj->*indexmember - 1 |
|
|
517 | : this->end (); |
|
|
518 | } |
|
|
519 | |
|
|
520 | void push_back (T *obj) |
|
|
521 | { |
|
|
522 | std::vector<T *, slice_allocator<T *> >::push_back (obj); |
|
|
523 | obj->*indexmember = this->size (); |
|
|
524 | } |
|
|
525 | |
|
|
526 | void insert (T *obj) |
|
|
527 | { |
|
|
528 | push_back (obj); |
|
|
529 | } |
|
|
530 | |
|
|
531 | void insert (T &obj) |
|
|
532 | { |
|
|
533 | insert (&obj); |
|
|
534 | } |
|
|
535 | |
|
|
536 | void erase (T *obj) |
|
|
537 | { |
|
|
538 | unsigned int pos = obj->*indexmember; |
|
|
539 | obj->*indexmember = 0; |
|
|
540 | |
|
|
541 | if (pos < this->size ()) |
|
|
542 | { |
|
|
543 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
|
|
544 | (*this)[pos - 1]->*indexmember = pos; |
|
|
545 | } |
|
|
546 | |
|
|
547 | this->pop_back (); |
|
|
548 | } |
|
|
549 | |
|
|
550 | void erase (T &obj) |
|
|
551 | { |
|
|
552 | erase (&obj); |
|
|
553 | } |
|
|
554 | }; |
| 204 | |
555 | |
| 205 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
556 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
| 206 | void assign (char *dst, const char *src, int maxlen); |
557 | void assign (char *dst, const char *src, int maxlen); |
| 207 | |
558 | |
| 208 | // type-safe version of assign |
559 | // type-safe version of assign |
| … | |
… | |
| 210 | inline void assign (char (&dst)[N], const char *src) |
561 | inline void assign (char (&dst)[N], const char *src) |
| 211 | { |
562 | { |
| 212 | assign ((char *)&dst, src, N); |
563 | assign ((char *)&dst, src, N); |
| 213 | } |
564 | } |
| 214 | |
565 | |
| 215 | #endif |
566 | typedef double tstamp; |
| 216 | |
567 | |
|
|
568 | // return current time as timestamp |
|
|
569 | tstamp now (); |
|
|
570 | |
|
|
571 | int similar_direction (int a, int b); |
|
|
572 | |
|
|
573 | // like sprintf, but returns a "static" buffer |
|
|
574 | const char *format (const char *format, ...); |
|
|
575 | |
|
|
576 | ///////////////////////////////////////////////////////////////////////////// |
|
|
577 | // threads, very very thin wrappers around pthreads |
|
|
578 | |
|
|
579 | struct thread |
|
|
580 | { |
|
|
581 | pthread_t id; |
|
|
582 | |
|
|
583 | void start (void *(*start_routine)(void *), void *arg = 0); |
|
|
584 | |
|
|
585 | void cancel () |
|
|
586 | { |
|
|
587 | pthread_cancel (id); |
|
|
588 | } |
|
|
589 | |
|
|
590 | void *join () |
|
|
591 | { |
|
|
592 | void *ret; |
|
|
593 | |
|
|
594 | if (pthread_join (id, &ret)) |
|
|
595 | cleanup ("pthread_join failed", 1); |
|
|
596 | |
|
|
597 | return ret; |
|
|
598 | } |
|
|
599 | }; |
|
|
600 | |
|
|
601 | // note that mutexes are not classes |
|
|
602 | typedef pthread_mutex_t smutex; |
|
|
603 | |
|
|
604 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
|
|
605 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
|
|
606 | #else |
|
|
607 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
|
|
608 | #endif |
|
|
609 | |
|
|
610 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
|
|
611 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
|
|
612 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
|
|
613 | |
|
|
614 | #endif |
|
|
615 | |
