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https://github.com/boostorg/fiber.git
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use C++11
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@@ -6,10 +6,12 @@
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#include "boost/fiber/recursive_mutex.hpp"
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#include <algorithm>
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#include <algorithm> // std::find()
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#include <mutex> // std::unique_lock
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#include <boost/assert.hpp>
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#include "boost/fiber/fiber_manager.hpp"
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#include "boost/fiber/interruption.hpp"
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#include "boost/fiber/operations.hpp"
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@@ -21,18 +23,14 @@ namespace boost {
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namespace fibers {
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bool
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recursive_mutex::lock_if_unlocked_()
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{
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if ( UNLOCKED == state_)
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{
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state_ = LOCKED;
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recursive_mutex::lock_if_unlocked_() {
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if ( mutex_status::unlocked == state_) {
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state_ = mutex_status::locked;
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BOOST_ASSERT( ! owner_);
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owner_ = this_fiber::get_id();
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++count_;
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return true;
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}
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else if ( this_fiber::get_id() == owner_)
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{
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} else if ( this_fiber::get_id() == owner_) {
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++count_;
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return true;
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}
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@@ -42,28 +40,27 @@ recursive_mutex::lock_if_unlocked_()
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recursive_mutex::recursive_mutex() :
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splk_(),
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state_( UNLOCKED),
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state_( mutex_status::unlocked),
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owner_(),
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count_( 0),
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waiting_()
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{}
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waiting_() {
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}
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recursive_mutex::~recursive_mutex()
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{
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recursive_mutex::~recursive_mutex() {
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BOOST_ASSERT( ! owner_);
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BOOST_ASSERT( 0 == count_);
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BOOST_ASSERT( waiting_.empty() );
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}
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void
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recursive_mutex::lock()
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{
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detail::fiber_base * f( fm_active() );
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for (;;)
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{
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unique_lock< detail::spinlock > lk( splk_);
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recursive_mutex::lock() {
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detail::fiber_handle f( fm_active() );
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for (;;) {
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std::unique_lock< detail::spinlock > lk( splk_);
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if ( lock_if_unlocked_() ) return;
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if ( lock_if_unlocked_() ) {
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return;
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}
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// store this fiber in order to be notified later
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BOOST_ASSERT( waiting_.end() == std::find( waiting_.begin(), waiting_.end(), f) );
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@@ -75,11 +72,12 @@ recursive_mutex::lock()
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}
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bool
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recursive_mutex::try_lock()
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{
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unique_lock< detail::spinlock > lk( splk_);
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recursive_mutex::try_lock() {
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std::unique_lock< detail::spinlock > lk( splk_);
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if ( lock_if_unlocked_() ) return true;
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if ( lock_if_unlocked_() ) {
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return true;
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}
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lk.unlock();
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// let other fiber release the lock
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@@ -88,25 +86,23 @@ recursive_mutex::try_lock()
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}
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void
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recursive_mutex::unlock()
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{
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BOOST_ASSERT( LOCKED == state_);
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recursive_mutex::unlock() {
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BOOST_ASSERT( mutex_status::locked == state_);
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BOOST_ASSERT( this_fiber::get_id() == owner_);
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unique_lock< detail::spinlock > lk( splk_);
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detail::fiber_base * f( 0);
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if ( 0 == --count_)
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{
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if ( ! waiting_.empty() )
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{
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std::unique_lock< detail::spinlock > lk( splk_);
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detail::fiber_handle f;
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if ( 0 == --count_) {
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if ( ! waiting_.empty() ) {
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f = waiting_.front();
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waiting_.pop_front();
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}
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owner_ = detail::fiber_base::id();
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state_ = UNLOCKED;
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state_ = mutex_status::unlocked;
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lk.unlock();
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if ( f) f->set_ready();
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if ( f) {
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f->set_ready();
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}
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}
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}
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