1 #include "test/jemalloc_test.h" 2 3 static void 4 test_prng_lg_range_u32(bool atomic) { 5 atomic_u32_t sa, sb; 6 uint32_t ra, rb; 7 unsigned lg_range; 8 9 atomic_store_u32(&sa, 42, ATOMIC_RELAXED); 10 ra = prng_lg_range_u32(&sa, 32, atomic); 11 atomic_store_u32(&sa, 42, ATOMIC_RELAXED); 12 rb = prng_lg_range_u32(&sa, 32, atomic); 13 assert_u32_eq(ra, rb, 14 "Repeated generation should produce repeated results"); 15 16 atomic_store_u32(&sb, 42, ATOMIC_RELAXED); 17 rb = prng_lg_range_u32(&sb, 32, atomic); 18 assert_u32_eq(ra, rb, 19 "Equivalent generation should produce equivalent results"); 20 21 atomic_store_u32(&sa, 42, ATOMIC_RELAXED); 22 ra = prng_lg_range_u32(&sa, 32, atomic); 23 rb = prng_lg_range_u32(&sa, 32, atomic); 24 assert_u32_ne(ra, rb, 25 "Full-width results must not immediately repeat"); 26 27 atomic_store_u32(&sa, 42, ATOMIC_RELAXED); 28 ra = prng_lg_range_u32(&sa, 32, atomic); 29 for (lg_range = 31; lg_range > 0; lg_range--) { 30 atomic_store_u32(&sb, 42, ATOMIC_RELAXED); 31 rb = prng_lg_range_u32(&sb, lg_range, atomic); 32 assert_u32_eq((rb & (UINT32_C(0xffffffff) << lg_range)), 33 0, "High order bits should be 0, lg_range=%u", lg_range); 34 assert_u32_eq(rb, (ra >> (32 - lg_range)), 35 "Expected high order bits of full-width result, " 36 "lg_range=%u", lg_range); 37 } 38 } 39 40 static void 41 test_prng_lg_range_u64(void) { 42 uint64_t sa, sb, ra, rb; 43 unsigned lg_range; 44 45 sa = 42; 46 ra = prng_lg_range_u64(&sa, 64); 47 sa = 42; 48 rb = prng_lg_range_u64(&sa, 64); 49 assert_u64_eq(ra, rb, 50 "Repeated generation should produce repeated results"); 51 52 sb = 42; 53 rb = prng_lg_range_u64(&sb, 64); 54 assert_u64_eq(ra, rb, 55 "Equivalent generation should produce equivalent results"); 56 57 sa = 42; 58 ra = prng_lg_range_u64(&sa, 64); 59 rb = prng_lg_range_u64(&sa, 64); 60 assert_u64_ne(ra, rb, 61 "Full-width results must not immediately repeat"); 62 63 sa = 42; 64 ra = prng_lg_range_u64(&sa, 64); 65 for (lg_range = 63; lg_range > 0; lg_range--) { 66 sb = 42; 67 rb = prng_lg_range_u64(&sb, lg_range); 68 assert_u64_eq((rb & (UINT64_C(0xffffffffffffffff) << lg_range)), 69 0, "High order bits should be 0, lg_range=%u", lg_range); 70 assert_u64_eq(rb, (ra >> (64 - lg_range)), 71 "Expected high order bits of full-width result, " 72 "lg_range=%u", lg_range); 73 } 74 } 75 76 static void 77 test_prng_lg_range_zu(bool atomic) { 78 atomic_zu_t sa, sb; 79 size_t ra, rb; 80 unsigned lg_range; 81 82 atomic_store_zu(&sa, 42, ATOMIC_RELAXED); 83 ra = prng_lg_range_zu(&sa, ZU(1) << (3 + LG_SIZEOF_PTR), atomic); 84 atomic_store_zu(&sa, 42, ATOMIC_RELAXED); 85 rb = prng_lg_range_zu(&sa, ZU(1) << (3 + LG_SIZEOF_PTR), atomic); 86 assert_zu_eq(ra, rb, 87 "Repeated generation should produce repeated results"); 88 89 atomic_store_zu(&sb, 42, ATOMIC_RELAXED); 90 rb = prng_lg_range_zu(&sb, ZU(1) << (3 + LG_SIZEOF_PTR), atomic); 91 assert_zu_eq(ra, rb, 92 "Equivalent generation should produce equivalent results"); 93 94 atomic_store_zu(&sa, 42, ATOMIC_RELAXED); 95 ra = prng_lg_range_zu(&sa, ZU(1) << (3 + LG_SIZEOF_PTR), atomic); 96 rb = prng_lg_range_zu(&sa, ZU(1) << (3 + LG_SIZEOF_PTR), atomic); 97 assert_zu_ne(ra, rb, 98 "Full-width results must not immediately repeat"); 99 100 atomic_store_zu(&sa, 42, ATOMIC_RELAXED); 101 ra = prng_lg_range_zu(&sa, ZU(1) << (3 + LG_SIZEOF_PTR), atomic); 102 for (lg_range = (ZU(1) << (3 + LG_SIZEOF_PTR)) - 1; lg_range > 0; 103 lg_range--) { 104 atomic_store_zu(&sb, 42, ATOMIC_RELAXED); 105 rb = prng_lg_range_zu(&sb, lg_range, atomic); 106 assert_zu_eq((rb & (SIZE_T_MAX << lg_range)), 107 0, "High order bits should be 0, lg_range=%u", lg_range); 108 assert_zu_eq(rb, (ra >> ((ZU(1) << (3 + LG_SIZEOF_PTR)) - 109 lg_range)), "Expected high order bits of full-width " 110 "result, lg_range=%u", lg_range); 111 } 112 } 113 114 TEST_BEGIN(test_prng_lg_range_u32_nonatomic) { 115 test_prng_lg_range_u32(false); 116 } 117 TEST_END 118 119 TEST_BEGIN(test_prng_lg_range_u32_atomic) { 120 test_prng_lg_range_u32(true); 121 } 122 TEST_END 123 124 TEST_BEGIN(test_prng_lg_range_u64_nonatomic) { 125 test_prng_lg_range_u64(); 126 } 127 TEST_END 128 129 TEST_BEGIN(test_prng_lg_range_zu_nonatomic) { 130 test_prng_lg_range_zu(false); 131 } 132 TEST_END 133 134 TEST_BEGIN(test_prng_lg_range_zu_atomic) { 135 test_prng_lg_range_zu(true); 136 } 137 TEST_END 138 139 static void 140 test_prng_range_u32(bool atomic) { 141 uint32_t range; 142 #define MAX_RANGE 10000000 143 #define RANGE_STEP 97 144 #define NREPS 10 145 146 for (range = 2; range < MAX_RANGE; range += RANGE_STEP) { 147 atomic_u32_t s; 148 unsigned rep; 149 150 atomic_store_u32(&s, range, ATOMIC_RELAXED); 151 for (rep = 0; rep < NREPS; rep++) { 152 uint32_t r = prng_range_u32(&s, range, atomic); 153 154 assert_u32_lt(r, range, "Out of range"); 155 } 156 } 157 } 158 159 static void 160 test_prng_range_u64(void) { 161 uint64_t range; 162 #define MAX_RANGE 10000000 163 #define RANGE_STEP 97 164 #define NREPS 10 165 166 for (range = 2; range < MAX_RANGE; range += RANGE_STEP) { 167 uint64_t s; 168 unsigned rep; 169 170 s = range; 171 for (rep = 0; rep < NREPS; rep++) { 172 uint64_t r = prng_range_u64(&s, range); 173 174 assert_u64_lt(r, range, "Out of range"); 175 } 176 } 177 } 178 179 static void 180 test_prng_range_zu(bool atomic) { 181 size_t range; 182 #define MAX_RANGE 10000000 183 #define RANGE_STEP 97 184 #define NREPS 10 185 186 for (range = 2; range < MAX_RANGE; range += RANGE_STEP) { 187 atomic_zu_t s; 188 unsigned rep; 189 190 atomic_store_zu(&s, range, ATOMIC_RELAXED); 191 for (rep = 0; rep < NREPS; rep++) { 192 size_t r = prng_range_zu(&s, range, atomic); 193 194 assert_zu_lt(r, range, "Out of range"); 195 } 196 } 197 } 198 199 TEST_BEGIN(test_prng_range_u32_nonatomic) { 200 test_prng_range_u32(false); 201 } 202 TEST_END 203 204 TEST_BEGIN(test_prng_range_u32_atomic) { 205 test_prng_range_u32(true); 206 } 207 TEST_END 208 209 TEST_BEGIN(test_prng_range_u64_nonatomic) { 210 test_prng_range_u64(); 211 } 212 TEST_END 213 214 TEST_BEGIN(test_prng_range_zu_nonatomic) { 215 test_prng_range_zu(false); 216 } 217 TEST_END 218 219 TEST_BEGIN(test_prng_range_zu_atomic) { 220 test_prng_range_zu(true); 221 } 222 TEST_END 223 224 int 225 main(void) { 226 return test( 227 test_prng_lg_range_u32_nonatomic, 228 test_prng_lg_range_u32_atomic, 229 test_prng_lg_range_u64_nonatomic, 230 test_prng_lg_range_zu_nonatomic, 231 test_prng_lg_range_zu_atomic, 232 test_prng_range_u32_nonatomic, 233 test_prng_range_u32_atomic, 234 test_prng_range_u64_nonatomic, 235 test_prng_range_zu_nonatomic, 236 test_prng_range_zu_atomic); 237 } 238
