977ed18d
 Hu Chunming
提交三方库
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// Copyright Oliver Kowalke 2013.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include "boost/fiber/fiber.hpp"
#include <system_error>
#include <boost/assert.hpp>
#include "boost/fiber/exceptions.hpp"
#include "boost/fiber/scheduler.hpp"
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
namespace boost {
namespace fibers {
void
fiber::start_() noexcept {
context * ctx = context::active();
ctx->attach( impl_.get() );
switch ( impl_->get_policy() ) {
case launch::post:
// push new fiber to ready-queue
// resume executing current fiber
ctx->get_scheduler()->schedule( impl_.get() );
break;
case launch::dispatch:
// resume new fiber and push current fiber
// to ready-queue
impl_->resume( ctx);
break;
default:
BOOST_ASSERT_MSG( false, "unknown launch-policy");
}
}
void
fiber::join() {
// FIXME: must fiber::join() be synchronized?
if ( BOOST_UNLIKELY( context::active()->get_id() == get_id() ) ) {
throw fiber_error{ std::make_error_code( std::errc::resource_deadlock_would_occur),
"boost fiber: trying to join itself" };
}
if ( BOOST_UNLIKELY( ! joinable() ) ) {
throw fiber_error{ std::make_error_code( std::errc::invalid_argument),
"boost fiber: fiber not joinable" };
}
impl_->join();
impl_.reset();
}
void
fiber::detach() {
if ( BOOST_UNLIKELY( ! joinable() ) ) {
throw fiber_error{ std::make_error_code( std::errc::invalid_argument),
"boost fiber: fiber not joinable" };
}
impl_.reset();
}
}}
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
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