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Index: boost_1_65_0/boost/context/continuation_fcontext.hpp
===================================================================
--- boost_1_65_0.orig/boost/context/continuation_fcontext.hpp
+++ boost_1_65_0/boost/context/continuation_fcontext.hpp
@@ -95,7 +95,7 @@ transfer_t context_ontop( transfer_t t)
t.data = nullptr;
Ctx c{ t.fctx };
// execute function, pass continuation via reference
- fn( std::move( c) );
+ c = fn( std::move( c) );
#if defined(BOOST_NO_CXX14_STD_EXCHANGE)
return { exchange( c.fctx_, nullptr), nullptr };
#else
Index: boost_1_65_0/boost/context/continuation_ucontext.hpp
===================================================================
--- boost_1_65_0.orig/boost/context/continuation_ucontext.hpp
+++ boost_1_65_0/boost/context/continuation_ucontext.hpp
@@ -84,18 +84,18 @@ static void entry_func( void * data) noe
struct BOOST_CONTEXT_DECL activation_record {
thread_local static activation_record * current_rec;
- ucontext_t uctx{};
- stack_context sctx{};
- bool main_ctx{ true };
- activation_record * from{ nullptr };
- std::function< void(activation_record*&) > ontop{};
- bool terminated{ false };
- bool force_unwind{ false };
+ ucontext_t uctx{};
+ stack_context sctx{};
+ bool main_ctx{ true };
+ activation_record * from{ nullptr };
+ std::function< activation_record*(activation_record*&) > ontop{};
+ bool terminated{ false };
+ bool force_unwind{ false };
#if defined(BOOST_USE_ASAN)
- void * fake_stack{ nullptr };
- void * stack_bottom{ nullptr };
- std::size_t stack_size{ 0 };
- bool started{ false };
+ void * fake_stack{ nullptr };
+ void * stack_bottom{ nullptr };
+ std::size_t stack_size{ 0 };
+ bool started{ false };
#endif
static activation_record *& current() noexcept;
@@ -168,20 +168,30 @@ struct BOOST_CONTEXT_DECL activation_rec
current()->ontop = std::bind(
[](typename std::decay< Fn >::type & fn, activation_record *& ptr){
Ctx c{ ptr };
- fn( std::move( c) );
+ c = fn( std::move( c) );
if ( ! c) {
ptr = nullptr;
}
+#if defined(BOOST_NO_CXX14_STD_EXCHANGE)
+ return exchange( c.ptr_, nullptr);
+#else
+ return std::exchange( c.ptr_, nullptr);
+#endif
},
std::forward< Fn >( fn),
std::placeholders::_1);
#else
current()->ontop = [fn=std::forward<Fn>(fn)](activation_record *& ptr){
Ctx c{ ptr };
- fn( std::move( c) );
+ c = fn( std::move( c) );
if ( ! c) {
ptr = nullptr;
}
+#if defined(BOOST_NO_CXX14_STD_EXCHANGE)
+ return exchange( c.ptr_, nullptr);
+#else
+ return std::exchange( c.ptr_, nullptr);
+#endif
};
#endif
#if defined(BOOST_USE_SEGMENTED_STACKS)
@@ -408,7 +418,7 @@ public:
if ( BOOST_UNLIKELY( detail::activation_record::current()->force_unwind) ) {
throw detail::forced_unwind{ ptr};
} else if ( BOOST_UNLIKELY( nullptr != detail::activation_record::current()->ontop) ) {
- detail::activation_record::current()->ontop( ptr);
+ ptr = detail::activation_record::current()->ontop( ptr);
detail::activation_record::current()->ontop = nullptr;
}
return continuation{ ptr };
@@ -426,7 +436,7 @@ public:
if ( BOOST_UNLIKELY( detail::activation_record::current()->force_unwind) ) {
throw detail::forced_unwind{ ptr};
} else if ( BOOST_UNLIKELY( nullptr != detail::activation_record::current()->ontop) ) {
- detail::activation_record::current()->ontop( ptr);
+ ptr = detail::activation_record::current()->ontop( ptr);
detail::activation_record::current()->ontop = nullptr;
}
return continuation{ ptr };
Index: boost_1_65_0/boost/context/continuation_winfib.hpp
===================================================================
--- boost_1_65_0.orig/boost/context/continuation_winfib.hpp
+++ boost_1_65_0/boost/context/continuation_winfib.hpp
@@ -65,13 +65,13 @@ static VOID WINAPI entry_func( LPVOID da
struct BOOST_CONTEXT_DECL activation_record {
thread_local static activation_record * current_rec;
- LPVOID fiber{ nullptr };
- stack_context sctx{};
- bool main_ctx{ true };
- activation_record * from{ nullptr };
- std::function< void(activation_record*&) > ontop{};
- bool terminated{ false };
- bool force_unwind{ false };
+ LPVOID fiber{ nullptr };
+ stack_context sctx{};
+ bool main_ctx{ true };
+ activation_record * from{ nullptr };
+ std::function< activation_record*(activation_record*&) > ontop{};
+ bool terminated{ false };
+ bool force_unwind{ false };
static activation_record *& current() noexcept;
@@ -142,20 +142,30 @@ struct BOOST_CONTEXT_DECL activation_rec
current()->ontop = std::bind(
[](typename std::decay< Fn >::type & fn, activation_record *& ptr){
Ctx c{ ptr };
- fn( std::move( c) );
+ c = fn( std::move( c) );
if ( ! c) {
ptr = nullptr;
}
+#if defined(BOOST_NO_CXX14_STD_EXCHANGE)
+ return exchange( c.ptr_, nullptr);
+#else
+ return std::exchange( c.ptr_, nullptr);
+#endif
},
std::forward< Fn >( fn),
std::placeholders::_1);
#else
current()->ontop = [fn=std::forward<Fn>(fn)](activation_record *& ptr){
Ctx c{ ptr };
- fn( std::move( c) );
+ c = fn( std::move( c) );
if ( ! c) {
ptr = nullptr;
}
+#if defined(BOOST_NO_CXX14_STD_EXCHANGE)
+ return exchange( c.ptr_, nullptr);
+#else
+ return std::exchange( c.ptr_, nullptr);
+#endif
};
#endif
// context switch
@@ -336,7 +346,7 @@ public:
if ( BOOST_UNLIKELY( detail::activation_record::current()->force_unwind) ) {
throw detail::forced_unwind{ ptr};
} else if ( BOOST_UNLIKELY( nullptr != detail::activation_record::current()->ontop) ) {
- detail::activation_record::current()->ontop( ptr);
+ ptr = detail::activation_record::current()->ontop( ptr);
detail::activation_record::current()->ontop = nullptr;
}
return continuation{ ptr };
@@ -354,7 +364,7 @@ public:
if ( BOOST_UNLIKELY( detail::activation_record::current()->force_unwind) ) {
throw detail::forced_unwind{ ptr};
} else if ( BOOST_UNLIKELY( nullptr != detail::activation_record::current()->ontop) ) {
- detail::activation_record::current()->ontop( ptr);
+ ptr = detail::activation_record::current()->ontop( ptr);
detail::activation_record::current()->ontop = nullptr;
}
return continuation{ ptr };
Index: boost_1_65_0/boost/thread/win32/condition_variable.hpp
===================================================================
--- boost_1_65_0.orig/boost/thread/win32/condition_variable.hpp
+++ boost_1_65_0/boost/thread/win32/condition_variable.hpp
@@ -211,7 +211,7 @@ namespace boost
{}
#endif
- void remove_waiter()
+ void remove_waiter_and_reset()
{
if (entry) {
boost::lock_guard<boost::mutex> internal_lock(internal_mutex);
@@ -221,7 +221,7 @@ namespace boost
}
~entry_manager() BOOST_NOEXCEPT_IF(false)
{
- remove_waiter();
+ remove_waiter_and_reset();
}
list_entry* operator->()
@@ -250,7 +250,7 @@ namespace boost
woken=entry->woken();
}
// do it here to avoid throwing on the destructor
- entry->remove_waiter();
+ entry.remove_waiter_and_reset();
locker.lock();
return woken;
}
Index: boost_1_65_0/libs/context/doc/callcc.qbk
===================================================================
--- boost_1_65_0.orig/libs/context/doc/callcc.qbk
+++ boost_1_65_0/libs/context/doc/callcc.qbk
@@ -176,6 +176,7 @@ return `void`.
c=c.resume_with([&data](ctx::continuation && c){
std::cout << "f2: entered: " << data << std::endl;
data=-1;
+ return std::move( c);
});
std::cout << "f1: returned third time" << std::endl;
@@ -221,6 +222,7 @@ an exception.
c = c.resume_with(
[](ctx::continuation && c){
throw my_exception(std::move(c),"abc");
+ return std::move( c);
});
output:
@@ -527,11 +529,11 @@ e.g. ['continuation::operator bool()] re
[variablelist
[[Effects:] [Captures current continuation and resumes `*this`.
-The function `resume_with`, is used to execute function `fn` in continuation
+The function `resume_with`, is used to execute function `fn` in the execution context of
`*this` (e.g. the stack frame of `fn` is allocated on stack of `*this`).]]
[[Returns:] [The continuation representing the continuation that has been
suspended.]]
-[[Note:] [Function `fn` needs to return void.]]
+[[Note:] [Function `fn` needs to return `continuation`.]]
[[Note:] [The returned continuation indicates if the suspended continuation has
terminated (return from context-function) via `bool operator()`.]]
]
Index: boost_1_65_0/libs/context/example/ontop.cpp
===================================================================
--- boost_1_65_0.orig/libs/context/example/ontop.cpp
+++ boost_1_65_0/libs/context/example/ontop.cpp
@@ -32,6 +32,7 @@ int main() {
c = c.resume_with( [&data](ctx::continuation && c){
std::cout << "f2: entered: " << data << std::endl;
data = -1;
+ return std::move( c);
});
std::cout << "f1: returned third time" << std::endl;
std::cout << "main: done" << std::endl;
Index: boost_1_65_0/libs/context/example/ontop_void.cpp
===================================================================
--- boost_1_65_0.orig/libs/context/example/ontop_void.cpp
+++ boost_1_65_0/libs/context/example/ontop_void.cpp
@@ -21,8 +21,9 @@ ctx::continuation f1( ctx::continuation
return std::move( c);
}
-void f2( ctx::continuation && c) {
+ctx::continuation f2( ctx::continuation && c) {
std::cout << "f2: entered" << std::endl;
+ return std::move( c);
}
int main() {
Index: boost_1_65_0/libs/context/example/throw.cpp
===================================================================
--- boost_1_65_0.orig/libs/context/example/throw.cpp
+++ boost_1_65_0/libs/context/example/throw.cpp
@@ -38,6 +38,7 @@ int main() {
c = c.resume_with(
[](ctx::continuation && c){
throw my_exception(std::move( c), "abc");
+ return std::move( c);
});
std::cout << "main: done" << std::endl;
Index: boost_1_65_0/libs/context/test/test_callcc.cpp
===================================================================
--- boost_1_65_0.orig/libs/context/test/test_callcc.cpp
+++ boost_1_65_0/libs/context/test/test_callcc.cpp
@@ -252,6 +252,7 @@ void test_ontop() {
c = c.resume_with(
[&i](ctx::continuation && c){
i -= 10;
+ return std::move( c);
});
BOOST_CHECK( c);
BOOST_CHECK_EQUAL( i, 200);
@@ -266,6 +267,7 @@ void test_ontop() {
c = c.resume_with(
[&c1](ctx::continuation && c){
c1 = std::move( c);
+ return std::move( c);
});
}
}
@@ -290,7 +292,8 @@ void test_ontop_exception() {
const char * what = "hello world";
c.resume_with(
[what](ctx::continuation && c){
- throw my_exception( std::move( c), what);
+ throw my_exception( std::move( c), what);
+ return std::move( c);
});
BOOST_CHECK_EQUAL( 3, value1);
BOOST_CHECK_EQUAL( std::string( what), value2);
Index: boost_1_65_0/libs/fiber/src/context.cpp
===================================================================
--- boost_1_65_0.orig/libs/fiber/src/context.cpp
+++ boost_1_65_0/libs/fiber/src/context.cpp
@@ -145,6 +145,7 @@ context::resume() noexcept {
// pass pointer to the context that resumes `this`
c_.resume_with([prev](boost::context::continuation && c){
prev->c_ = std::move( c);
+ return boost::context::continuation{};
});
}
@@ -158,6 +159,7 @@ context::resume( detail::spinlock_lock &
c_.resume_with([prev,&lk](boost::context::continuation && c){
prev->c_ = std::move( c);
lk.unlock();
+ return boost::context::continuation{};
});
}
@@ -171,6 +173,7 @@ context::resume( context * ready_ctx) no
c_.resume_with([prev,ready_ctx](boost::context::continuation && c){
prev->c_ = std::move( c);
context::active()->schedule( ready_ctx);
+ return boost::context::continuation{};
});
}
@@ -218,6 +221,7 @@ context::suspend_with_cc() noexcept {
// pass pointer to the context that resumes `this`
return c_.resume_with([prev](boost::context::continuation && c){
prev->c_ = std::move( c);
+ return boost::context::continuation{};
});
}