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| 2 | // Copyright Oliver Kowalke 2009. |
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| 3 | // Distributed under the Boost Software License, Version 1.0. |
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| 4 | // (See accompanying file LICENSE_1_0.txt or copy at |
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| 5 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | |
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| 7 | #include "boost/coroutine/detail/coroutine_context.hpp" |
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| 8 | |
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| 9 | #include "boost/coroutine/detail/data.hpp" |
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| 10 | |
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| 11 | #ifdef BOOST_HAS_ABI_HEADERS |
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| 12 | # include BOOST_ABI_PREFIX |
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| 13 | #endif |
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| 14 | |
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| 15 | #if defined(_MSC_VER) |
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| 16 | # pragma warning(push) |
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| 17 | # pragma warning(disable:4355) |
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| 18 | #endif |
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| 19 | |
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| 20 | #if defined(BOOST_USE_SEGMENTED_STACKS) |
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| 21 | extern "C" { |
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| 22 | |
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| 23 | void __splitstack_getcontext( void * [BOOST_CONTEXT_SEGMENTS]); |
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| 24 | |
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| 25 | void __splitstack_setcontext( void * [BOOST_CONTEXT_SEGMENTS]); |
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| 26 | |
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| 27 | } |
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| 28 | #endif |
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| 29 | |
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| 30 | namespace boost { |
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| 31 | namespace coroutines { |
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| 32 | namespace detail { |
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| 33 | |
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| 34 | coroutine_context::coroutine_context() : |
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| 35 | palloc_(), |
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| 36 | ctx_( 0) |
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| 37 | {} |
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| 38 | |
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| 39 | coroutine_context::coroutine_context( ctx_fn fn, preallocated const& palloc) : |
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| 40 | palloc_( palloc), |
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| 41 | ctx_( context::detail::make_fcontext( sp: palloc_.sp, size: palloc_.size, fn) ) |
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| 42 | {} |
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| 43 | |
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| 44 | coroutine_context::coroutine_context( coroutine_context const& other) : |
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| 45 | palloc_( other.palloc_), |
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| 46 | ctx_( other.ctx_) |
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| 47 | {} |
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| 48 | |
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| 49 | coroutine_context & |
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| 50 | coroutine_context::operator=( coroutine_context const& other) |
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| 51 | { |
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| 52 | if ( this == & other) return * this; |
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| 53 | |
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| 54 | palloc_ = other.palloc_; |
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| 55 | ctx_ = other.ctx_; |
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| 56 | |
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| 57 | return * this; |
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| 58 | } |
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| 59 | |
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| 60 | void * |
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| 61 | coroutine_context::jump( coroutine_context & other, void * param) |
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| 62 | { |
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| 63 | #if defined(BOOST_USE_SEGMENTED_STACKS) |
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| 64 | __splitstack_getcontext( palloc_.sctx.segments_ctx); |
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| 65 | __splitstack_setcontext( other.palloc_.sctx.segments_ctx); |
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| 66 | #endif |
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| 67 | data_t data = { .from: this, .data: param }; |
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| 68 | context::detail::transfer_t t = context::detail::jump_fcontext( to: other.ctx_, vp: & data); |
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| 69 | data_t * ret = static_cast< data_t * >( t.data); |
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| 70 | ret->from->ctx_ = t.fctx; |
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| 71 | return ret->data; |
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| 72 | } |
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| 73 | |
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| 74 | }}} |
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| 75 | |
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| 76 | #if defined(_MSC_VER) |
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| 77 | # pragma warning(pop) |
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| 78 | #endif |
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| 79 | |
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| 80 | #ifdef BOOST_HAS_ABI_HEADERS |
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| 81 | # include BOOST_ABI_SUFFIX |
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| 82 | #endif |
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| 83 | |
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