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update elem_def.h

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zhangyi 2020-03-30 11:11:01 +08:00
parent d762634380
commit 5a92ea3031
1 changed files with 0 additions and 1 deletions
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src/circ/elem_def.h
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@ -47,7 +47,6 @@ public:
for (unsigned k = 0;;) { for (unsigned k = 0;;) {
cc_t curr = cc_.load(std::memory_order_acquire); cc_t curr = cc_.load(std::memory_order_acquire);
cc_t next = curr | (curr + 1); // find the first 0, and set it to 1. cc_t next = curr | (curr + 1); // find the first 0, and set it to 1.
if (next == 0) return 0;
if (cc_.compare_exchange_weak(curr, next, std::memory_order_release)) { if (cc_.compare_exchange_weak(curr, next, std::memory_order_release)) {
return next ^ curr; // return connected id return next ^ curr; // return connected id
} }