xref: /OK3568_Linux_fs/kernel/scripts/atomic/fallbacks/dec_unless_positive (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyuncat <<EOF
2*4882a593Smuzhiyunstatic __always_inline bool
3*4882a593Smuzhiyun${arch}${atomic}_dec_unless_positive(${atomic}_t *v)
4*4882a593Smuzhiyun{
5*4882a593Smuzhiyun	${int} c = ${arch}${atomic}_read(v);
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun	do {
8*4882a593Smuzhiyun		if (unlikely(c > 0))
9*4882a593Smuzhiyun			return false;
10*4882a593Smuzhiyun	} while (!${arch}${atomic}_try_cmpxchg(v, &c, c - 1));
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun	return true;
13*4882a593Smuzhiyun}
14*4882a593SmuzhiyunEOF
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