source: src/libcfa/concurrency/coroutines @ 77e6fcb

aaron-thesisarm-ehcleanup-dtorsdeferred_resndemanglerenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerpthread-emulationresolv-newwith_gc
Last change on this file since 77e6fcb was 77e6fcb, checked in by Thierry Delisle <tdelisle@…>, 6 years ago

Removed trailing semi-colon on thread/coroutine declaration macro

  • Property mode set to 100644
File size: 4.0 KB
Line 
1//                              - *- Mode: CFA - *-
2//
3// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
4//
5// The contents of this file are covered under the licence agreement in the
6// file "LICENCE" distributed with Cforall.
7//
8// coroutines --
9//
10// Author           : Thierry Delisle
11// Created On       : Mon Nov 28 12:27:26 2016
12// Last Modified By : Thierry Delisle
13// Last Modified On : Mon Nov 28 12:27:26 2016
14// Update Count     : 0
15//
16
17#ifndef COROUTINES_H
18#define COROUTINES_H
19
20#include "assert"
21#include "invoke.h"
22
23//-----------------------------------------------------------------------------
24// Coroutine trait
25// Anything that implements this trait can be resumed.
26// Anything that is resumed is a coroutine.
27trait is_coroutine(dtype T) {
28      void main(T * this);
29      coroutine * get_coroutine(T * this);
30};
31
32#define DECL_COROUTINE(X) static inline coroutine* get_coroutine(X* this) { return &this->c; } void main(X* this)
33
34//-----------------------------------------------------------------------------
35// Ctors and dtors
36void ?{}(coStack_t * this);
37void ?{}(coroutine * this);
38void ^?{}(coStack_t * this);
39void ^?{}(coroutine * this);
40
41//-----------------------------------------------------------------------------
42// Public coroutine API
43static inline void suspend();
44
45forall(dtype T | is_coroutine(T))
46static inline void resume(T * cor);
47
48forall(dtype T | is_coroutine(T))
49void prime(T * cor);
50
51//-----------------------------------------------------------------------------
52// PRIVATE exposed because of inline
53
54// Start coroutine routines
55extern "C" {
56      forall(dtype T | is_coroutine(T))
57      void CtxInvokeCoroutine(T * this);
58
59      forall(dtype T | is_coroutine(T))
60      void CtxStart(T * this, void ( *invoke)(T *));
61}
62
63// Get current coroutine
64coroutine * this_coroutine(void);
65
66// Private wrappers for context switch and stack creation
67extern void CoroutineCtxSwitch(coroutine * src, coroutine * dst);
68extern void create_stack( coStack_t * this, unsigned int storageSize );
69
70// Suspend implementation inlined for performance
71static inline void suspend() {
72      coroutine * src = this_coroutine();               // optimization
73
74        assertf( src->last != 0,
75                "Attempt to suspend coroutine \"%.256s\" (%p) that has never been resumed.\n"
76                "Possible cause is a suspend executed in a member called by a coroutine user rather than by the coroutine main.",
77                src->name, src );
78        assertf( src->last->notHalted,
79                "Attempt by coroutine \"%.256s\" (%p) to suspend back to terminated coroutine \"%.256s\" (%p).\n"
80                "Possible cause is terminated coroutine's main routine has already returned.",
81                src->name, src, src->last->name, src->last );
82
83        CoroutineCtxSwitch( src, src->last );
84}
85
86// Resume implementation inlined for performance
87forall(dtype T | is_coroutine(T))
88static inline void resume(T * cor) {
89        coroutine * src = this_coroutine();             // optimization
90        coroutine * dst = get_coroutine(cor);
91
92      if( unlikely(!dst->stack.base) ) {
93                create_stack(&dst->stack, dst->stack.size);
94                CtxStart(cor, CtxInvokeCoroutine);
95        }
96
97      // not resuming self ?
98        if ( src != dst ) {
99                assertf( dst->notHalted ,
100                        "Attempt by coroutine %.256s (%p) to resume terminated coroutine %.256s (%p).\n"
101                        "Possible cause is terminated coroutine's main routine has already returned.",
102                        src->name, src, dst->name, dst );
103
104            // set last resumer
105                dst->last = src;
106        } // if
107
108      // always done for performance testing
109        CoroutineCtxSwitch( src, dst );
110}
111
112static inline void resume(coroutine * dst) {
113        coroutine * src = this_coroutine();             // optimization
114
115      // not resuming self ?
116        if ( src != dst ) {
117                assertf( dst->notHalted ,
118                        "Attempt by coroutine %.256s (%p) to resume terminated coroutine %.256s (%p).\n"
119                        "Possible cause is terminated coroutine's main routine has already returned.",
120                        src->name, src, dst->name, dst );
121
122            // set last resumer
123                dst->last = src;
124        } // if
125
126      // always done for performance testing
127        CoroutineCtxSwitch( src, dst );
128}
129
130#endif //COROUTINES_H
131
132// Local Variables: //
133// mode: c //
134// tab-width: 4 //
135// End: //
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