的關係,我很困惑與DispatchQueue和DispatchSemaphore.Like下面的例子: let semaphore : DispatchSemaphore = DispatchSemaphore(value:1)
for i in 1...40 {
DispatchQueue.global().async{
semaphore.wait()
NS
此代碼與合同: import std.stdio;
int TestContract(int a)
in
{
assert(a > 0);
}
do
{
return a + 1;
}
int main(string[] args)
{
auto a = 2;
try
{
writeln(a," + 1 is ",