source: libcfa/src/stdlib.hfa@ e8b3717

Last change on this file since e8b3717 was 3770b87, checked in by Peter A. Buhr <pabuhr@…>, 2 years ago

formatting, add PRNG copy to checkpoint PRNG state, remove autogen PRNG copy constructor and assignment to prevent accidental PRNG copy

  • Property mode set to 100644
File size: 21.2 KB
RevLine 
[bd85400]1//
2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
[bb82c03]7// stdlib --
[bd85400]8//
9// Author : Peter A. Buhr
10// Created On : Thu Jan 28 17:12:35 2016
[b89c7c2]11// Last Modified By : Peter A. Buhr
[3770b87]12// Last Modified On : Sun Oct 8 09:18:28 2023
13// Update Count : 789
[bd85400]14//
15
[53a6c2a]16#pragma once
[17e5e2b]17
[94429f8]18#include "bits/defs.hfa" // OPTIONAL_THREAD
19#include "bits/align.hfa" // libAlign
[12b5e94a]20#include "bits/random.hfa" // prng
[b5e725a]21#include <Exception.hfa>
22#include <heap.hfa>
[2026bb6]23
[d46ed6e]24#include <stdlib.h> // *alloc, strto*, ato*
[76acb60]25#include <errno.h>
[2210cfc]26
[ca7949b]27// Reduce includes by explicitly defining these routines.
[3ce0d440]28extern "C" {
[4e7c0fc0]29 void * memalign( size_t alignment, size_t size ); // malloc.h
30 void * pvalloc( size_t size ); // malloc.h
[b9c04946]31 void * memset( void * dest, int fill, size_t size ); // string.h
[57fc7d8]32 void * memcpy( void * dest, const void * src, size_t size ); // string.h
[3ce0d440]33} // extern "C"
[e672372]34
[bd85400]35//---------------------------------------
36
[45161b4d]37#ifndef EXIT_FAILURE
38#define EXIT_FAILURE 1 // failing exit status
39#define EXIT_SUCCESS 0 // successful exit status
40#endif // ! EXIT_FAILURE
41
42//---------------------------------------
43
[c354108]44#include "common.hfa"
45
46//---------------------------------------
47
[fd54fef]48static inline forall( T & | sized(T) ) {
[4803a901]49 // CFA safe equivalents, i.e., implicit size specification
[3ce0d440]50
[74b19fb]51 T * malloc( void ) {
[aa0a1ad]52 if ( _Alignof(T) <= libAlign() ) return (T *)malloc( sizeof(T) ); // C allocation
[68f0c4e]53 else return (T *)memalign( _Alignof(T), sizeof(T) );
[74b19fb]54 } // malloc
55
[856fe3e]56 T * aalloc( size_t dim ) {
[aa0a1ad]57 if ( _Alignof(T) <= libAlign() ) return (T *)aalloc( dim, sizeof(T) ); // C allocation
58 else return (T *)amemalign( _Alignof(T), dim, sizeof(T) );
[856fe3e]59 } // aalloc
60
[74b19fb]61 T * calloc( size_t dim ) {
[aa0a1ad]62 if ( _Alignof(T) <= libAlign() ) return (T *)calloc( dim, sizeof(T) ); // C allocation
63 else return (T *)cmemalign( _Alignof(T), dim, sizeof(T) );
[74b19fb]64 } // calloc
65
[b89c7c2]66 T * resize( T * ptr, size_t size ) { // CFA resize, eliminate return-type cast
[aa0a1ad]67 if ( _Alignof(T) <= libAlign() ) return (T *)resize( (void *)ptr, size ); // CFA resize
68 else return (T *)resize( (void *)ptr, _Alignof(T), size ); // CFA resize
[856fe3e]69 } // resize
70
[d74369b]71 T * realloc( T * ptr, size_t size ) { // CFA realloc, eliminate return-type cast
[aa0a1ad]72 if ( _Alignof(T) <= libAlign() ) return (T *)realloc( (void *)ptr, size ); // C realloc
73 else return (T *)realloc( (void *)ptr, _Alignof(T), size ); // CFA realloc
[74b19fb]74 } // realloc
75
76 T * memalign( size_t align ) {
[cafb687]77 return (T *)memalign( align, sizeof(T) ); // C memalign
[74b19fb]78 } // memalign
79
[856fe3e]80 T * amemalign( size_t align, size_t dim ) {
81 return (T *)amemalign( align, dim, sizeof(T) ); // CFA amemalign
82 } // amemalign
83
[d74369b]84 T * cmemalign( size_t align, size_t dim ) {
85 return (T *)cmemalign( align, dim, sizeof(T) ); // CFA cmemalign
86 } // cmemalign
87
[74b19fb]88 T * aligned_alloc( size_t align ) {
[cafb687]89 return (T *)aligned_alloc( align, sizeof(T) ); // C aligned_alloc
[74b19fb]90 } // aligned_alloc
91
92 int posix_memalign( T ** ptr, size_t align ) {
93 return posix_memalign( (void **)ptr, align, sizeof(T) ); // C posix_memalign
94 } // posix_memalign
[ada0246d]95
96 T * valloc( void ) {
97 return (T *)valloc( sizeof(T) ); // C valloc
98 } // valloc
99
100 T * pvalloc( void ) {
101 return (T *)pvalloc( sizeof(T) ); // C pvalloc
102 } // pvalloc
[55acc3a]103} // distribution
104
[ceb7db8]105/*
106 FIX ME : fix alloc interface after Ticker Number 214 is resolved, define and add union to S_fill. Then, modify postfix-fill functions to support T * with nmemb, char, and T object of any size. Finally, change alloc_internal.
107 Or, just follow the instructions below for that.
108
109 1. Replace the current forall-block that contains defintions of S_fill and S_realloc with following:
[fd54fef]110 forall( T & | sized(T) ) {
[ceb7db8]111 union U_fill { char c; T * a; T t; };
[685810e]112 struct S_fill { char tag; U_fill(T) fill; };
[ceb7db8]113 struct S_realloc { inline T *; };
114 }
115
116 2. Replace all current postfix-fill functions with following for updated S_fill:
117 S_fill(T) ?`fill( char a ) { S_fill(T) ret = {'c'}; ret.fill.c = a; return ret; }
118 S_fill(T) ?`fill( T a ) { S_fill(T) ret = {'t'}; memcpy(&ret.fill.t, &a, sizeof(T)); return ret; }
119 S_fill(T) ?`fill( T a[], size_t nmemb ) { S_fill(T) ret = {'a', nmemb}; ret.fill.a = a; return ret; }
120
[6c5d92f]121 3. Replace the alloc_internal$ function which is outside ttype forall-block with following function:
122 T * alloc_internal$( void * Resize, T * Realloc, size_t Align, size_t Dim, S_fill(T) Fill) {
[ceb7db8]123 T * ptr = NULL;
124 size_t size = sizeof(T);
125 size_t copy_end = 0;
126
127 if(Resize) {
128 ptr = (T*) (void *) resize( (int *)Resize, Align, Dim * size );
129 } else if (Realloc) {
130 if (Fill.tag != '0') copy_end = min(malloc_size( Realloc ), Dim * size);
131 ptr = (T*) (void *) realloc( (int *)Realloc, Align, Dim * size );
132 } else {
133 ptr = (T*) (void *) memalign( Align, Dim * size );
134 }
135
136 if(Fill.tag == 'c') {
137 memset( (char *)ptr + copy_end, (int)Fill.fill.c, Dim * size - copy_end );
138 } else if(Fill.tag == 't') {
139 for ( int i = copy_end; i <= Dim * size - size ; i += size ) {
140 memcpy( (char *)ptr + i, &Fill.fill.t, size );
141 }
142 } else if(Fill.tag == 'a') {
143 memcpy( (char *)ptr + copy_end, Fill.fill.a, min(Dim * size - copy_end, size * Fill.nmemb) );
144 }
145
146 return ptr;
[6c5d92f]147 } // alloc_internal$
[ceb7db8]148*/
149
150typedef struct S_align { inline size_t; } T_align;
151typedef struct S_resize { inline void *; } T_resize;
152
[fd54fef]153forall( T & ) {
[ceb7db8]154 struct S_fill { char tag; char c; size_t size; T * at; char t[50]; };
155 struct S_realloc { inline T *; };
156}
157
158static inline T_align ?`align ( size_t a ) { return (T_align){a}; }
159static inline T_resize ?`resize ( void * a ) { return (T_resize){a}; }
[74b19fb]160
[fd54fef]161static inline forall( T & | sized(T) ) {
[ceb7db8]162 S_fill(T) ?`fill ( T t ) {
163 S_fill(T) ret = { 't' };
164 size_t size = sizeof(T);
[3d3d75e]165 if ( size > sizeof(ret.t) ) {
166 abort( "ERROR: const object of size greater than 50 bytes given for dynamic memory fill\n" );
167 } // if
[ceb7db8]168 memcpy( &ret.t, &t, size );
169 return ret;
170 }
[7a6ae53]171 S_fill(T) ?`fill ( zero_t ) = void; // FIX ME: remove this once ticket 214 is resolved
172 S_fill(T) ?`fill ( T * a ) { return (S_fill(T)){ 'T', '0', 0, a }; } // FIX ME: remove this once ticket 214 is resolved
[ceb7db8]173 S_fill(T) ?`fill ( char c ) { return (S_fill(T)){ 'c', c }; }
174 S_fill(T) ?`fill ( T a[], size_t nmemb ) { return (S_fill(T)){ 'a', '0', nmemb * sizeof(T), a }; }
175
176 S_realloc(T) ?`realloc ( T * a ) { return (S_realloc(T)){a}; }
177
[6c5d92f]178 T * alloc_internal$( void * Resize, T * Realloc, size_t Align, size_t Dim, S_fill(T) Fill ) {
[ceb7db8]179 T * ptr = NULL;
180 size_t size = sizeof(T);
181 size_t copy_end = 0;
[f67b983]182
183 if ( Resize ) {
[68f0c4e]184 ptr = (T*) (void *) resize( (void *)Resize, Align, Dim * size );
[f67b983]185 } else if ( Realloc ) {
[3d3d75e]186 if ( Fill.tag != '0' ) copy_end = min(malloc_size( Realloc ), Dim * size );
187 ptr = (T *) (void *) realloc( (void *)Realloc, Align, Dim * size );
[cfbc703d]188 } else {
[3d3d75e]189 ptr = (T *) (void *) memalign( Align, Dim * size );
[ceb7db8]190 }
191
[3d3d75e]192 if ( Fill.tag == 'c' ) {
[ceb7db8]193 memset( (char *)ptr + copy_end, (int)Fill.c, Dim * size - copy_end );
[3d3d75e]194 } else if ( Fill.tag == 't' ) {
[f6a4917]195 for ( i; copy_end ~ Dim * size ~ size ) {
[3d3d75e]196 #pragma GCC diagnostic push
197 #pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
[d1b70d4]198 assert( size <= sizeof(Fill.t) );
199 memcpy( (char *)ptr + i, &Fill.t, size );
[3d3d75e]200 #pragma GCC diagnostic pop
[ceb7db8]201 }
[3d3d75e]202 } else if ( Fill.tag == 'a' ) {
[ceb7db8]203 memcpy( (char *)ptr + copy_end, Fill.at, min(Dim * size - copy_end, Fill.size) );
[3d3d75e]204 } else if ( Fill.tag == 'T' ) {
205 memcpy( (char *)ptr + copy_end, Fill.at, Dim * size );
[ceb7db8]206 }
207
208 return ptr;
[6c5d92f]209 } // alloc_internal$
[ceb7db8]210
[6c5d92f]211 forall( TT... | { T * alloc_internal$( void *, T *, size_t, size_t, S_fill(T), TT ); } ) {
[58e97d9]212 T * alloc_internal$( void *, T *, size_t Align, size_t Dim, S_fill(T) Fill, T_resize Resize, TT rest ) {
[6c5d92f]213 return alloc_internal$( Resize, (T*)0p, Align, Dim, Fill, rest);
[ceb7db8]214 }
215
[58e97d9]216 T * alloc_internal$( void *, T *, size_t Align, size_t Dim, S_fill(T) Fill, S_realloc(T) Realloc, TT rest ) {
[6c5d92f]217 return alloc_internal$( (void*)0p, Realloc, Align, Dim, Fill, rest);
[ceb7db8]218 }
219
[58e97d9]220 T * alloc_internal$( void * Resize, T * Realloc, size_t, size_t Dim, S_fill(T) Fill, T_align Align, TT rest ) {
[6c5d92f]221 return alloc_internal$( Resize, Realloc, Align, Dim, Fill, rest);
[ceb7db8]222 }
223
[58e97d9]224 T * alloc_internal$( void * Resize, T * Realloc, size_t Align, size_t Dim, S_fill(T), S_fill(T) Fill, TT rest ) {
225 return alloc_internal$( Resize, Realloc, Align, Dim, Fill, rest );
[ceb7db8]226 }
227
228 T * alloc( TT all ) {
[58e97d9]229 return alloc_internal$( (void*)0p, (T*)0p, (_Alignof(T) > libAlign() ? _Alignof(T) : libAlign()), (size_t)1, (S_fill(T)){'0'}, all );
[ceb7db8]230 }
231
232 T * alloc( size_t dim, TT all ) {
[58e97d9]233 return alloc_internal$( (void*)0p, (T*)0p, (_Alignof(T) > libAlign() ? _Alignof(T) : libAlign()), dim, (S_fill(T)){'0'}, all );
[ceb7db8]234 }
235 } // distribution TT
236} // distribution T
[3ce0d440]237
[fd54fef]238static inline forall( T & | sized(T) ) {
[4803a901]239 // CFA safe initialization/copy, i.e., implicit size specification, non-array types
[b9c04946]240 T * memset( T * dest, char fill ) {
241 return (T *)memset( dest, fill, sizeof(T) );
[3ce0d440]242 } // memset
243
244 T * memcpy( T * dest, const T * src ) {
245 return (T *)memcpy( dest, src, sizeof(T) );
246 } // memcpy
247
[4803a901]248 // CFA safe initialization/copy, i.e., implicit size specification, array types
[b9c04946]249 T * amemset( T dest[], char fill, size_t dim ) {
250 return (T *)(void *)memset( dest, fill, dim * sizeof(T) ); // C memset
251 } // amemset
[3ce0d440]252
[b9c04946]253 T * amemcpy( T dest[], const T src[], size_t dim ) {
[3ce0d440]254 return (T *)(void *)memcpy( dest, src, dim * sizeof(T) ); // C memcpy
[b9c04946]255 } // amemcpy
[3ce0d440]256} // distribution
[f3fc631f]257
[4803a901]258// CFA deallocation for multiple objects
[fd54fef]259static inline forall( T & ) // FIX ME, problems with 0p in list
[4803a901]260void free( T * ptr ) {
261 free( (void *)ptr ); // C free
262} // free
[fd54fef]263static inline forall( T &, TT... | { void free( TT ); } )
[4803a901]264void free( T * ptr, TT rest ) {
265 free( ptr );
[94429f8]266 free( rest );
267} // free
268
[4803a901]269// CFA allocation/deallocation and constructor/destructor, non-array types
[fd54fef]270static inline forall( T & | sized(T), TT... | { void ?{}( T &, TT ); } )
[94429f8]271T * new( TT p ) {
[09ee131]272 return &(*(T *)malloc()){ p }; // run constructor
[94429f8]273} // new
274
[fd54fef]275static inline forall( T & | { void ^?{}( T & ); } )
[94429f8]276void delete( T * ptr ) {
[0f7a0ea]277 // special case for 0-sized object => always call destructor
278 if ( ptr || sizeof(ptr) == 0 ) { // ignore null but not 0-sized objects
[94429f8]279 ^(*ptr){}; // run destructor
280 } // if
[4803a901]281 free( ptr ); // always call free
[94429f8]282} // delete
[fd54fef]283static inline forall( T &, TT... | { void ^?{}( T & ); void delete( TT ); } )
[94429f8]284void delete( T * ptr, TT rest ) {
285 delete( ptr );
286 delete( rest );
287} // delete
[627f585]288
[4803a901]289// CFA allocation/deallocation and constructor/destructor, array types
[fd54fef]290forall( T & | sized(T), TT... | { void ?{}( T &, TT ); } ) T * anew( size_t dim, TT p );
291forall( T & | sized(T) | { void ^?{}( T & ); } ) void adelete( T arr[] );
292forall( T & | sized(T) | { void ^?{}( T & ); }, TT... | { void adelete( TT ); } ) void adelete( T arr[], TT rest );
[6065b3aa]293
[bd85400]294//---------------------------------------
295
[57fc7d8]296static inline {
[76acb60]297 int strto( const char sptr[], char * eptr[], int base ) { return (int)strtol( sptr, eptr, base ); }
298 unsigned int strto( const char sptr[], char * eptr[], int base ) { return (unsigned int)strtoul( sptr, eptr, base ); }
299 long int strto( const char sptr[], char * eptr[], int base ) { return strtol( sptr, eptr, base ); }
300 unsigned long int strto( const char sptr[], char * eptr[], int base ) { return strtoul( sptr, eptr, base ); }
301 long long int strto( const char sptr[], char * eptr[], int base ) { return strtoll( sptr, eptr, base ); }
302 unsigned long long int strto( const char sptr[], char * eptr[], int base ) { return strtoull( sptr, eptr, base ); }
303
304 float strto( const char sptr[], char * eptr[] ) { return strtof( sptr, eptr ); }
305 double strto( const char sptr[], char * eptr[] ) { return strtod( sptr, eptr ); }
306 long double strto( const char sptr[], char * eptr[] ) { return strtold( sptr, eptr ); }
[57fc7d8]307} // distribution
[e672372]308
[76acb60]309float _Complex strto( const char sptr[], char * eptr[] );
310double _Complex strto( const char sptr[], char * eptr[] );
311long double _Complex strto( const char sptr[], char * eptr[] );
312
[b5e725a]313ExceptionDecl( out_of_range );
314ExceptionDecl( invalid_argument );
[76acb60]315
316forall( T | { T strto( const char sptr[], char * eptr[], int ); } )
317T convert( const char sptr[] );
[bd85400]318
[57fc7d8]319static inline {
[e3fea42]320 int ato( const char sptr[] ) { return (int)strtol( sptr, 0p, 10 ); }
321 unsigned int ato( const char sptr[] ) { return (unsigned int)strtoul( sptr, 0p, 10 ); }
322 long int ato( const char sptr[] ) { return strtol( sptr, 0p, 10 ); }
323 unsigned long int ato( const char sptr[] ) { return strtoul( sptr, 0p, 10 ); }
324 long long int ato( const char sptr[] ) { return strtoll( sptr, 0p, 10 ); }
325 unsigned long long int ato( const char sptr[] ) { return strtoull( sptr, 0p, 10 ); }
326
327 float ato( const char sptr[] ) { return strtof( sptr, 0p ); }
328 double ato( const char sptr[] ) { return strtod( sptr, 0p ); }
329 long double ato( const char sptr[] ) { return strtold( sptr, 0p ); }
330
331 float _Complex ato( const char sptr[] ) { return strto( sptr, 0p ); }
332 double _Complex ato( const char sptr[] ) { return strto( sptr, 0p ); }
333 long double _Complex ato( const char sptr[] ) { return strto( sptr, 0p ); }
[57fc7d8]334} // distribution
[e672372]335
[bd85400]336//---------------------------------------
337
[fd54fef]338forall( E | { int ?<?( E, E ); } ) {
[3ce0d440]339 E * bsearch( E key, const E * vals, size_t dim );
340 size_t bsearch( E key, const E * vals, size_t dim );
341 E * bsearchl( E key, const E * vals, size_t dim );
342 size_t bsearchl( E key, const E * vals, size_t dim );
343 E * bsearchu( E key, const E * vals, size_t dim );
344 size_t bsearchu( E key, const E * vals, size_t dim );
345} // distribution
[9c47a47]346
[fd54fef]347forall( K, E | { int ?<?( K, K ); K getKey( const E & ); } ) {
[3ce0d440]348 E * bsearch( K key, const E * vals, size_t dim );
349 size_t bsearch( K key, const E * vals, size_t dim );
350 E * bsearchl( K key, const E * vals, size_t dim );
351 size_t bsearchl( K key, const E * vals, size_t dim );
352 E * bsearchu( K key, const E * vals, size_t dim );
353 size_t bsearchu( K key, const E * vals, size_t dim );
354} // distribution
[bd85400]355
[fd54fef]356forall( E | { int ?<?( E, E ); } ) {
[b9c04946]357 void qsort( E * vals, size_t dim );
358} // distribution
359
[bd85400]360//---------------------------------------
361
[bbe1a87]362extern "C" { // override C version
363 void srandom( unsigned int seed );
[4e7c0fc0]364 long int random( void ); // GENERATES POSITIVE AND NEGATIVE VALUES
365 // For positive values, use unsigned int, e.g., unsigned int r = random() % 100U;
[bbe1a87]366} // extern "C"
367
368static inline {
[aa8e24c3]369 long int random( long int l, long int u ) { if ( u < l ) [u, l] = [l, u]; return lrand48() % (u - l + 1) + l; } // [l,u]
370 long int random( long int u ) { return random( 0, u - 1 ); } // [0,u)
[bbe1a87]371 unsigned long int random( void ) { return lrand48(); }
372 unsigned long int random( unsigned long int u ) { return lrand48() % u; } // [0,u)
[aa8e24c3]373 unsigned long int random( unsigned long int l, unsigned long int u ) { if ( u < l ) [u, l] = [l, u]; return lrand48() % (u - l + 1) + l; } // [l,u]
[bbe1a87]374
375 char random( void ) { return (unsigned long int)random(); }
[24d6572]376 char random( char u ) { return (unsigned long int)random( (unsigned long int)u ); } // [0,u)
[bbe1a87]377 char random( char l, char u ) { return random( (unsigned long int)l, (unsigned long int)u ); } // [l,u)
378 int random( void ) { return (long int)random(); }
[24d6572]379 int random( int u ) { return (long int)random( (long int)u ); } // [0,u]
[bbe1a87]380 int random( int l, int u ) { return random( (long int)l, (long int)u ); } // [l,u)
381 unsigned int random( void ) { return (unsigned long int)random(); }
[24d6572]382 unsigned int random( unsigned int u ) { return (unsigned long int)random( (unsigned long int)u ); } // [0,u]
[bbe1a87]383 unsigned int random( unsigned int l, unsigned int u ) { return random( (unsigned long int)l, (unsigned long int)u ); } // [l,u)
384} // distribution
385
386float random( void ); // [0.0, 1.0)
387double random( void ); // [0.0, 1.0)
388float _Complex random( void ); // [0.0, 1.0)+[0.0, 1.0)i
389double _Complex random( void ); // [0.0, 1.0)+[0.0, 1.0)i
390long double _Complex random( void ); // [0.0, 1.0)+[0.0, 1.0)i
[bd85400]391
392//---------------------------------------
393
[1959528]394// Sequential Pseudo Random-Number Generator : generate repeatable sequence of values that appear random.
395//
396// Declaration :
397// PRNG sprng = { 1009 } - set starting seed versus random seed
[a892e61]398//
[1959528]399// Interface :
400// set_seed( sprng, 1009 ) - set starting seed for ALL kernel threads versus random seed
401// get_seed( sprng ) - read seed
402// prng( sprng ) - generate random value in range [0,UINT_MAX]
403// prng( sprng, u ) - generate random value in range [0,u)
404// prng( sprng, l, u ) - generate random value in range [l,u]
405// calls( sprng ) - number of generated random value so far
406//
407// Examples : generate random number between 5-21
408// prng( sprng ) % 17 + 5; values 0-16 + 5 = 5-21
409// prng( sprng, 16 + 1 ) + 5;
410// prng( sprng, 5, 21 );
411// calls( sprng );
412
[8a97248]413forall( PRNG &, R )
414trait basic_prng {
[20cf96d]415 void set_seed( PRNG & prng, R seed ); // set seed
416 R get_seed( PRNG & prng ); // get seed
[d2ad151]417 R prng( PRNG & prng );
418 void ?{}( PRNG & prng ); // random seed
[20cf96d]419 void ?{}( PRNG & prng, R seed ); // fixed seed
[d2ad151]420}; // basic_prng
421
[20cf96d]422static inline forall( PRNG &, R | basic_prng( PRNG, R ) | { R ?%?( R, R ); } ) {
[d2ad151]423 R prng( PRNG & prng, R u ) { return prng( prng ) % u; } // [0,u)
424}
[20cf96d]425static inline forall( PRNG &, R | basic_prng( PRNG, R ) | { R ?+?( R, R ); R ?-?( R, R ); R ?%?( R, R ); void ?{}( R &, one_t ); } ) {
[d2ad151]426 R prng( PRNG & prng, R l, R u ) { return prng( prng, u - l + (R){1} ) + l; } // [l,u]
427}
428
429struct PRNG32 {
[aa8e24c3]430 uint32_t callcnt; // call count
431 uint32_t seed; // current seed
[dd46fd3]432 PRNG_STATE_32_T state; // random state
[3770b87]433}; // PRNG32
[d2ad151]434
435static inline {
[261e107]436 void set_seed( PRNG32 & prng, uint32_t seed_ ) with( prng ) { seed = seed_; PRNG_SET_SEED_32( state, seed ); }
437 uint32_t get_seed( PRNG32 & prng ) __attribute__(( warn_unused_result )) with( prng ) { return seed; }
[5f31bf0]438 void ?{}( PRNG32 & prng, uint32_t seed ) with( prng ) { callcnt = 0; set_seed( prng, seed ); } // fixed seed
439 void ?{}( PRNG32 & prng ) with( prng ) { ?{}( prng, rdtscl() ); } // random seed
[dd46fd3]440 uint32_t prng( PRNG32 & prng ) __attribute__(( warn_unused_result )) with( prng ) { callcnt += 1; return PRNG_NAME_32( state ); } // [0,UINT_MAX]
[ac8b016]441 uint32_t prng( PRNG32 & prng, uint32_t u ) __attribute__(( warn_unused_result )) { return prng( prng ) % u; } // [0,u)
442 uint32_t prng( PRNG32 & prng, uint32_t l, uint32_t u ) __attribute__(( warn_unused_result )) { return prng( prng, u - l + 1 ) + l; } // [l,u]
[d2ad151]443 uint32_t calls( PRNG32 & prng ) __attribute__(( warn_unused_result )) with( prng ) { return callcnt; }
[3770b87]444 void copy( PRNG32 & dst, PRNG32 & src ) { dst = src; } // checkpoint PRNG state, use autogen assignment
[d2ad151]445} // distribution
[3770b87]446void ?{}( PRNG32 &, PRNG32 & ) = void; // no copy, remove autogen copy constructor
447PRNG32 & ?=?( PRNG32 &, const PRNG32 ) = void; // no assignment, remove autogen assignment
[d2ad151]448
449struct PRNG64 {
450 uint64_t callcnt; // call count
451 uint64_t seed; // current seed
[dd46fd3]452 PRNG_STATE_64_T state; // random state
[3770b87]453}; // PRNG64
[aa8e24c3]454
455static inline {
[261e107]456 void set_seed( PRNG64 & prng, uint64_t seed_ ) with( prng ) { seed = seed_; PRNG_SET_SEED_64( state, seed ); }
457 uint64_t get_seed( PRNG64 & prng ) __attribute__(( warn_unused_result )) with( prng ) { return seed; }
[5f31bf0]458 void ?{}( PRNG64 & prng, uint64_t seed ) with( prng ) { callcnt = 0; set_seed( prng, seed ); } // fixed seed
459 void ?{}( PRNG64 & prng ) with( prng ) { ?{}( prng, rdtscl() ); } // random seed
[dd46fd3]460 uint64_t prng( PRNG64 & prng ) __attribute__(( warn_unused_result )) with( prng ) { callcnt += 1; return PRNG_NAME_64( state ); } // [0,UINT_MAX]
[ac8b016]461 uint64_t prng( PRNG64 & prng, uint64_t u ) __attribute__(( warn_unused_result )) { return prng( prng ) % u; } // [0,u)
462 uint64_t prng( PRNG64 & prng, uint64_t l, uint64_t u ) __attribute__(( warn_unused_result )) { return prng( prng, u - l + 1 ) + l; } // [l,u]
[d2ad151]463 uint64_t calls( PRNG64 & prng ) __attribute__(( warn_unused_result )) with( prng ) { return callcnt; }
[3770b87]464 void copy( PRNG64 & dst, PRNG64 & src ) { dst = src; } // checkpoint PRNG state, use autogen assignment
[aa8e24c3]465} // distribution
[3770b87]466void ?{}( PRNG64 &, PRNG64 & ) = void; // no copy, remove autogen copy constructor
467PRNG64 & ?=?( PRNG64 &, const PRNG64 ) = void; // no assignment, remove autogen assignment
[aa8e24c3]468
[b5e725a]469// Set default random-generator size.
470#if defined( __x86_64__ ) || defined( __aarch64__ ) // 64-bit architecture
471#define PRNG PRNG64
472#else // 32-bit architecture
473#define PRNG PRNG32
474#endif // __x86_64__
475
[1959528]476// Concurrent Pseudo Random-Number Generator : generate repeatable sequence of values that appear random.
477//
478// Interface :
479// set_seed( 1009 ) - fixed seed for all kernel threads versus random seed
480// get_seed() - read seed
481// prng() - generate random value in range [0,UINT_MAX]
482// prng( u ) - generate random value in range [0,u)
483// prng( l, u ) - generate random value in range [l,u]
484//
485// Examples : generate random number between 5-21
486// prng() % 17 + 5; values 0-16 + 5 = 5-21
487// prng( 16 + 1 ) + 5;
488// prng( 5, 21 );
489
[d2ad151]490// Harmonize with concurrency/thread.hfa.
[d8bdf13]491void set_seed( size_t seed_ ) OPTIONAL_THREAD; // set global seed
492size_t get_seed() __attribute__(( warn_unused_result )); // get global seed
[20cf96d]493size_t prng( void ) __attribute__(( warn_unused_result )) OPTIONAL_THREAD; // [0,UINT_MAX]
[aa8e24c3]494static inline {
[20cf96d]495 size_t prng( size_t u ) __attribute__(( warn_unused_result )) { return prng() % u; } // [0,u)
496 size_t prng( size_t l, size_t u ) __attribute__(( warn_unused_result )) { return prng( u - l + 1 ) + l; } // [l,u]
[aa8e24c3]497} // distribution
498
499//---------------------------------------
500
[94429f8]501extern bool threading_enabled( void ) OPTIONAL_THREAD;
[2026bb6]502
[bd85400]503// Local Variables: //
504// mode: c //
505// tab-width: 4 //
506// End: //
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