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libcfa/src/concurrency/locks.hfa (modified) (1 diff)
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libcfa/src/concurrency/locks.hfa
r2ad5e1d5 r55b060d 182 182 static inline void lock( mcs_spin_lock & l, mcs_spin_node & n ) { 183 183 n.locked = true; 184 185 #if defined(__ARM_ARCH)186 __asm__ __volatile__ ( "DMB ISH" ::: );187 #endif188 189 184 mcs_spin_node * prev = __atomic_exchange_n(&l.queue.tail, &n, __ATOMIC_SEQ_CST); 190 185 if( prev == 0p ) return; 191 186 prev->next = &n; 192 193 #if defined(__ARM_ARCH)194 __asm__ __volatile__ ( "DMB ISH" ::: );195 #endif196 197 187 while( __atomic_load_n(&n.locked, __ATOMIC_RELAXED) ) Pause(); 198 199 #if defined(__ARM_ARCH)200 __asm__ __volatile__ ( "DMB ISH" ::: );201 #endif202 188 } 203 189 204 190 static inline void unlock(mcs_spin_lock & l, mcs_spin_node & n) { 205 #if defined(__ARM_ARCH)206 __asm__ __volatile__ ( "DMB ISH" ::: );207 #endif208 209 191 mcs_spin_node * n_ptr = &n; 210 192 if (__atomic_compare_exchange_n(&l.queue.tail, &n_ptr, 0p, false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)) return; 211 193 while (__atomic_load_n(&n.next, __ATOMIC_RELAXED) == 0p) Pause(); 212 213 #if defined(__ARM_ARCH)214 __asm__ __volatile__ ( "DMB ISH" ::: );215 #endif216 217 194 n.next->locked = false; 218 195 }
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