TEST_AND_SET_BIT(9) Basic C Library Functions TEST_AND_SET_BIT(9) NAME test_and_set_bit - Set a bit and return its old value SYNOPSIS int test_and_set_bit(int nr, volatile unsigned long * addr); ARGUMENTS nr Bit to set addr Address to count from DESCRIPTION This operation is atomic and cannot be reordered. It also implies a memory barrier. COPYRIGHT Kernel Hackers Manual 2.6. November 2013 TEST_AND_SET_BIT(9)[top]
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