1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
// RUN: %empty-directory(%t)
// RUN: %{python} %utils/split_file.py -o %t %s
// RUN: %target-swift-frontend %t/Main.swift -parse-as-library -import-bridging-header %t/BridgingHeader.h -enable-experimental-feature Embedded -c -o %t/main.o
// RUN: %target-clang %t/main.o -o %t/a.out -dead_strip -pthreads
// RUN: %target-run %t/a.out | %FileCheck %s
// REQUIRES: swift_in_compiler
// REQUIRES: executable_test
// REQUIRES: optimized_stdlib
// REQUIRES: OS=macosx || OS=linux-gnu
// BEGIN BridgingHeader.h
typedef void *pthread_t;
int pthread_create(pthread_t *thread, const void *attr, void *(*start_routine)(void *), void *arg);
int pthread_join(pthread_t thread, void **value_ptr);
unsigned int sleep(unsigned int);
int usleep(unsigned int);
// BEGIN Main.swift
public struct MyStructWithAnExpensiveInitializer {
static var singleton = MyStructWithAnExpensiveInitializer()
static var n = 0
init() {
print("MyStructWithAnExpensiveInitializer.init")
usleep(100_000)
MyStructWithAnExpensiveInitializer.n += 1
print("MyStructWithAnExpensiveInitializer.init done")
}
func foo() {
precondition(MyStructWithAnExpensiveInitializer.n == 1)
}
}
@main
struct Main {
static func main() {
print("Start")
var t1 = pthread_t(bitPattern: 0)
pthread_create(&t1, nil, { _ in
MyStructWithAnExpensiveInitializer.singleton.foo()
return nil
}, nil)
var t2 = pthread_t(bitPattern: 0)
pthread_create(&t2, nil, { _ in
MyStructWithAnExpensiveInitializer.singleton.foo()
return nil
}, nil)
pthread_join(t1, nil)
pthread_join(t2, nil)
print("All done")
// CHECK: Start
// CHECK-NEXT: MyStructWithAnExpensiveInitializer.init
// CHECK-NEXT: MyStructWithAnExpensiveInitializer.init done
// CHECK-NEXT: All done
}
}
|
