Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 1 | //===------------------------- thread.cpp----------------------------------===// |
| 2 | // |
Howard Hinnant | f5256e1 | 2010-05-11 21:36:01 +0000 | [diff] [blame] | 3 | // The LLVM Compiler Infrastructure |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "thread" |
| 11 | #include "exception" |
Howard Hinnant | 47499b1 | 2010-08-27 20:10:19 +0000 | [diff] [blame^] | 12 | #include "vector" |
| 13 | #include "future" |
Howard Hinnant | 0bfe880 | 2010-05-25 17:25:25 +0000 | [diff] [blame] | 14 | #include <sys/types.h> |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 15 | #include <sys/sysctl.h> |
| 16 | |
| 17 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 18 | |
| 19 | thread::~thread() |
| 20 | { |
Howard Hinnant | adff489 | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 21 | if (__t_ != 0) |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 22 | terminate(); |
| 23 | } |
| 24 | |
| 25 | void |
| 26 | thread::join() |
| 27 | { |
| 28 | int ec = pthread_join(__t_, 0); |
Howard Hinnant | d444470 | 2010-08-11 17:04:31 +0000 | [diff] [blame] | 29 | #ifndef _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 30 | if (ec) |
| 31 | throw system_error(error_code(ec, system_category()), "thread::join failed"); |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 32 | #endif // _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | adff489 | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 33 | __t_ = 0; |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 34 | } |
| 35 | |
| 36 | void |
| 37 | thread::detach() |
| 38 | { |
| 39 | int ec = EINVAL; |
| 40 | if (__t_ != 0) |
| 41 | { |
| 42 | ec = pthread_detach(__t_); |
| 43 | if (ec == 0) |
| 44 | __t_ = 0; |
| 45 | } |
Howard Hinnant | d444470 | 2010-08-11 17:04:31 +0000 | [diff] [blame] | 46 | #ifndef _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 47 | if (ec) |
| 48 | throw system_error(error_code(ec, system_category()), "thread::detach failed"); |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 49 | #endif // _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 50 | } |
| 51 | |
| 52 | unsigned |
| 53 | thread::hardware_concurrency() |
| 54 | { |
Howard Hinnant | adff489 | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 55 | #if defined(CTL_HW) && defined(HW_NCPU) |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 56 | int n; |
| 57 | int mib[2] = {CTL_HW, HW_NCPU}; |
| 58 | std::size_t s = sizeof(n); |
| 59 | sysctl(mib, 2, &n, &s, 0, 0); |
| 60 | return n; |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 61 | #else // defined(CTL_HW) && defined(HW_NCPU) |
Howard Hinnant | adff489 | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 62 | // TODO: grovel through /proc or check cpuid on x86 and similar |
| 63 | // instructions on other architectures. |
| 64 | return 0; // Means not computable [thread.thread.static] |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 65 | #endif // defined(CTL_HW) && defined(HW_NCPU) |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | namespace this_thread |
| 69 | { |
| 70 | |
| 71 | void |
| 72 | sleep_for(const chrono::nanoseconds& ns) |
| 73 | { |
| 74 | using namespace chrono; |
| 75 | if (ns >= nanoseconds::zero()) |
| 76 | { |
| 77 | timespec ts; |
| 78 | ts.tv_sec = static_cast<decltype(ts.tv_sec)>(duration_cast<seconds>(ns).count()); |
| 79 | ts.tv_nsec = static_cast<decltype(ts.tv_nsec)>((ns - seconds(ts.tv_sec)).count()); |
| 80 | nanosleep(&ts, 0); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | } // this_thread |
| 85 | |
Howard Hinnant | 47499b1 | 2010-08-27 20:10:19 +0000 | [diff] [blame^] | 86 | __thread_specific_ptr<__thread_struct> __thread_local_data; |
| 87 | |
| 88 | // __thread_struct_imp |
| 89 | |
| 90 | class __thread_struct_imp |
| 91 | { |
| 92 | typedef vector<__assoc_sub_state*> _AsyncStates; |
| 93 | _AsyncStates async_states_; |
| 94 | |
| 95 | __thread_struct_imp(const __thread_struct_imp&); |
| 96 | __thread_struct_imp& operator=(const __thread_struct_imp&); |
| 97 | public: |
| 98 | __thread_struct_imp() {} |
| 99 | ~__thread_struct_imp(); |
| 100 | |
| 101 | void __make_ready_at_thread_exit(__assoc_sub_state* __s); |
| 102 | }; |
| 103 | |
| 104 | __thread_struct_imp::~__thread_struct_imp() |
| 105 | { |
| 106 | for (_AsyncStates::iterator i = async_states_.begin(), e = async_states_.end(); |
| 107 | i != e; ++i) |
| 108 | { |
| 109 | (*i)->__make_ready(); |
| 110 | (*i)->__release_shared(); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | void |
| 115 | __thread_struct_imp::__make_ready_at_thread_exit(__assoc_sub_state* __s) |
| 116 | { |
| 117 | async_states_.push_back(__s); |
| 118 | __s->__add_shared(); |
| 119 | } |
| 120 | |
| 121 | // __thread_struct |
| 122 | |
| 123 | __thread_struct::__thread_struct() |
| 124 | : __p_(new __thread_struct_imp) |
| 125 | { |
| 126 | } |
| 127 | |
| 128 | __thread_struct::~__thread_struct() |
| 129 | { |
| 130 | delete __p_; |
| 131 | } |
| 132 | |
| 133 | void |
| 134 | __thread_struct::__make_ready_at_thread_exit(__assoc_sub_state* __s) |
| 135 | { |
| 136 | __p_->__make_ready_at_thread_exit(__s); |
| 137 | } |
| 138 | |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 139 | _LIBCPP_END_NAMESPACE_STD |