diff options
Diffstat (limited to 'host/lib/usrp')
| -rw-r--r-- | host/lib/usrp/e300/e300_fifo_config.cpp | 38 |
1 files changed, 24 insertions, 14 deletions
diff --git a/host/lib/usrp/e300/e300_fifo_config.cpp b/host/lib/usrp/e300/e300_fifo_config.cpp index 4138bb581..43d14aa65 100644 --- a/host/lib/usrp/e300/e300_fifo_config.cpp +++ b/host/lib/usrp/e300/e300_fifo_config.cpp @@ -95,36 +95,44 @@ static UHD_INLINE size_t ZF_STREAM_OFF(const size_t which) struct e300_fifo_poll_waiter { e300_fifo_poll_waiter(const int fd): - fd(fd) + _fd(fd), + _poll_claimed(false) { //NOP } void wait(const double timeout) { - if (_poll_claimed.cas(1, 0)) + if (timeout == 0) { + return; + } + + boost::mutex::scoped_lock l(_mutex); + if (_poll_claimed) { - boost::mutex::scoped_lock l(mutex); - cond.wait(l); + _cond.timed_wait(l, boost::posix_time::microseconds(timeout*1000000)); } else { + _poll_claimed = true; + l.unlock(); struct pollfd fds[1]; - fds[0].fd = fd; + fds[0].fd = _fd; fds[0].events = POLLIN; ::poll(fds, 1, long(timeout*1000)); if (fds[0].revents & POLLIN) - ::read(fd, NULL, 0); + ::read(_fd, NULL, 0); - _poll_claimed.write(0); - cond.notify_all(); + l.lock(); + _poll_claimed = 0; + _cond.notify_all(); } } - uhd::atomic_uint32_t _poll_claimed; - boost::condition_variable cond; - boost::mutex mutex; - int fd; + boost::condition_variable _cond; + boost::mutex _mutex; + int _fd; + bool _poll_claimed; }; static const size_t DEFAULT_FRAME_SIZE = 2048; @@ -236,7 +244,7 @@ public: UHD_INLINE typename T::sptr get_buff(const double timeout) { const time_spec_t exit_time = time_spec_t::get_system_time() + time_spec_t(timeout); - do + while (1) { if (zf_peek32(_addrs.ctrl + ARBITER_RB_STATUS_OCC)) { @@ -248,10 +256,12 @@ public: _index = 0; return _buffs[_index++]->get_new<T>(); } + if (time_spec_t::get_system_time() > exit_time) { + break; + } _waiter->wait(timeout); //boost::this_thread::sleep(boost::posix_time::milliseconds(1)); } - while (time_spec_t::get_system_time() < exit_time); return typename T::sptr(); } |