37 lines
595 B
V
37 lines
595 B
V
module sync
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import sync.stdatomic
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pub struct ManyTimes {
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mut:
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m RwMutex
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pub:
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times u64 = 1
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count u64
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}
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// new_many_times return a new ManyTimes struct.
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pub fn new_many_times(times u64) &ManyTimes {
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mut many_times := &ManyTimes{
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times: times
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}
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many_times.m.init()
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return many_times
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}
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// do execute the function only setting times.
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pub fn (mut m ManyTimes) do(f fn ()) {
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if stdatomic.load_u64(&m.count) < m.times {
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m.do_slow(f)
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}
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}
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fn (mut m ManyTimes) do_slow(f fn ()) {
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m.m.@lock()
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if m.count < m.times {
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stdatomic.store_u64(&m.count, m.count + 1)
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f()
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}
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m.m.unlock()
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}
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