/Users/buildslave/jenkins/workspace/coverage/llvm-project/libcxx/src/random_shuffle.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | //===----------------------------------------------------------------------===// |
2 | | // |
3 | | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | | // See https://llvm.org/LICENSE.txt for license information. |
5 | | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | | // |
7 | | //===----------------------------------------------------------------------===// |
8 | | |
9 | | #include <algorithm> |
10 | | #include <random> |
11 | | |
12 | | #ifndef _LIBCPP_HAS_NO_THREADS |
13 | | # include <mutex> |
14 | | # if defined(__ELF__) && defined(_LIBCPP_LINK_PTHREAD_LIB) |
15 | | # pragma comment(lib, "pthread") |
16 | | # endif |
17 | | #endif |
18 | | |
19 | | _LIBCPP_BEGIN_NAMESPACE_STD |
20 | | |
21 | | #ifndef _LIBCPP_HAS_NO_THREADS |
22 | | static constinit __libcpp_mutex_t __rs_mut = _LIBCPP_MUTEX_INITIALIZER; |
23 | | #endif |
24 | | unsigned __rs_default::__c_ = 0; |
25 | | |
26 | | __rs_default::__rs_default() |
27 | 0 | { |
28 | 0 | #ifndef _LIBCPP_HAS_NO_THREADS |
29 | 0 | __libcpp_mutex_lock(&__rs_mut); |
30 | 0 | #endif |
31 | 0 | __c_ = 1; |
32 | 0 | } |
33 | | |
34 | | __rs_default::__rs_default(const __rs_default&) |
35 | 0 | { |
36 | 0 | ++__c_; |
37 | 0 | } |
38 | | |
39 | | __rs_default::~__rs_default() |
40 | 0 | { |
41 | 0 | #ifndef _LIBCPP_HAS_NO_THREADS |
42 | 0 | if (--__c_ == 0) |
43 | 0 | __libcpp_mutex_unlock(&__rs_mut); |
44 | | #else |
45 | | --__c_; |
46 | | #endif |
47 | 0 | } |
48 | | |
49 | | __rs_default::result_type |
50 | | __rs_default::operator()() |
51 | 0 | { |
52 | 0 | static mt19937 __rs_g; |
53 | 0 | return __rs_g(); |
54 | 0 | } |
55 | | |
56 | | __rs_default |
57 | | __rs_get() |
58 | 0 | { |
59 | 0 | return __rs_default(); |
60 | 0 | } |
61 | | |
62 | | _LIBCPP_END_NAMESPACE_STD |