2 Copyright (c) 2018-2019 Nokia.
4 Licensed under the Apache License, Version 2.0 (the "License");
5 you may not use this file except in compliance with the License.
6 You may obtain a copy of the License at
8 http://www.apache.org/licenses/LICENSE-2.0
10 Unless required by applicable law or agreed to in writing, software
11 distributed under the License is distributed on an "AS IS" BASIS,
12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 See the License for the specific language governing permissions and
14 limitations under the License.
17 #include "private/system.hpp"
18 #include <system_error>
22 #include <sys/epoll.h>
23 #include <sys/timerfd.h>
24 #include <sys/eventfd.h>
25 #include "private/abort.hpp"
26 #include "private/createlogger.hpp"
28 using namespace shareddatalayer;
30 int System::poll(struct pollfd *fds, nfds_t nfds, int timeout)
32 const int ret(::poll(fds, nfds, timeout));
33 if (ret == -1 && errno != EINTR)
34 throw std::system_error(errno, std::system_category(), "poll");
38 int System::epoll_create1(int flags)
40 const int ret(::epoll_create1(flags));
42 throw std::system_error(errno, std::system_category(), "epoll_create1");
46 void System::epoll_ctl(int epfd, int op, int fd, epoll_event* event)
48 const int ret(::epoll_ctl(epfd, op, fd, event));
50 throw std::system_error(errno, std::system_category(), "epoll_ctl");
53 int System::epoll_wait(int epfd, epoll_event* events, int maxevents, int timeout)
55 const int ret(::epoll_wait(epfd, events, maxevents, timeout));
56 if ((ret == -1) && (errno != EINTR))
57 throw std::system_error(errno, std::system_category(), "epoll_wait");
61 int System::timerfd_create(int clockid, int flags)
63 const int ret(::timerfd_create(clockid, flags));
65 throw std::system_error(errno, std::system_category(), "timerfd_create");
69 void System::timerfd_settime(int fd, int flags, const itimerspec* new_value, itimerspec* old_value)
71 const int ret(::timerfd_settime(fd, flags, new_value, old_value));
73 throw std::system_error(errno, std::system_category(), "timerfd_settime");
76 ssize_t System::read(int fd, void* buf, size_t count)
78 const ssize_t ret(::read(fd, buf, count));
79 if ((ret == -1) && (errno != EINTR) && (errno != EAGAIN))
80 throw std::system_error(errno, std::system_category(), "read");
84 int System::eventfd(unsigned int initval, int flags)
86 const int ret(::eventfd(initval, flags));
88 throw std::system_error(errno, std::system_category(), "eventfd");
92 ssize_t System::write(int fd, const void* buf, size_t count)
96 ret = ::write(fd, buf, count);
97 while ((ret == -1) && (errno == EINTR));
99 throw std::system_error(errno, std::system_category(), "write");
103 std::chrono::steady_clock::duration System::time_since_epoch()
105 return std::chrono::steady_clock::now().time_since_epoch();
108 void System::close(int fd)
110 if (::close(fd) == -1)
112 int errno_saved = errno;
113 std::ostringstream msg;
114 msg << "close(" << fd << ") failed: " << strerror(errno_saved);
115 logErrorOnce(msg.str());
116 SHAREDDATALAYER_ABORT("close failed");
120 const char* System::getenv(const char* name)
122 return ::getenv(name);
125 System& System::getSystem() noexcept
127 static System system;