Changeset 6a3d2e7 for src/libcfa/concurrency/coroutines
- Timestamp:
- Jan 17, 2017, 1:33:11 PM (8 years ago)
- Branches:
- ADT, aaron-thesis, arm-eh, ast-experimental, cleanup-dtors, deferred_resn, demangler, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, new-env, no_list, persistent-indexer, pthread-emulation, qualifiedEnum, resolv-new, with_gc
- Children:
- 2fc88be
- Parents:
- aed3f54
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
src/libcfa/concurrency/coroutines
raed3f54 r6a3d2e7 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. 27 trait is_coroutine(dtype T) { 28 void co_main(T* this); 29 coroutine* get_coroutine(T* this); 30 }; 31 32 //----------------------------------------------------------------------------- 33 // Ctors and dtors 34 void ?{}(coStack_t* this); 35 void ?{}(coroutine* this); 36 void ^?{}(coStack_t* this); 37 void ^?{}(coroutine* this); 38 39 //----------------------------------------------------------------------------- 40 // Public coroutine API 41 static inline void suspend(); 42 43 forall(dtype T | is_coroutine(T)) 44 static inline void resume(T* cor); 45 46 forall(dtype T | is_coroutine(T)) 47 void prime(T* cor); 48 49 //----------------------------------------------------------------------------- 50 // PRIVATE exposed because of inline 51 52 // Start coroutine routines 53 extern "C" { 54 forall(dtype T | is_coroutine(T)) 55 void CtxInvokeCoroutine(T* this); 56 57 forall(dtype T | is_coroutine(T)) 58 void CtxStart(T* this, void (*invoke)(T*)); 59 } 60 61 // Get current coroutine 62 extern coroutine* current_coroutine; //PRIVATE, never use directly 63 static inline coroutine* this_coroutine(void) { 64 return current_coroutine; 65 } 66 67 // Private wrappers for context switch and stack creation 68 extern void corCxtSw(coroutine* src, coroutine* dst); 69 extern void create_stack( coStack_t* this, unsigned int storageSize ); 70 71 // Suspend implementation inlined for performance 72 static inline void suspend() { 73 coroutine* src = this_coroutine(); // optimization 74 75 assertf( src->last != 0, 76 "Attempt to suspend coroutine %.256s (%p) that has never been resumed.\n" 77 "Possible cause is a suspend executed in a member called by a coroutine user rather than by the coroutine main.", 78 src->name, src ); 79 assertf( src->last->notHalted, 80 "Attempt by coroutine %.256s (%p) to suspend back to terminated coroutine %.256s (%p).\n" 81 "Possible cause is terminated coroutine's main routine has already returned.", 82 src->name, src, src->last->name, src->last ); 83 84 corCxtSw( src, src->last ); 85 } 86 87 // Resume implementation inlined for performance 88 forall(dtype T | is_coroutine(T)) 89 static inline void resume(T* cor) { 90 coroutine* src = this_coroutine(); // optimization 91 coroutine* dst = get_coroutine(cor); 92 93 if( unlikely(!dst->stack.base) ) { 94 create_stack(&dst->stack, dst->stack.size); 95 CtxStart(cor, CtxInvokeCoroutine); 96 } 97 98 // not resuming self ? 99 if ( src != dst ) { 100 assertf( dst->notHalted , 101 "Attempt by coroutine %.256s (%p) to resume terminated coroutine %.256s (%p).\n" 102 "Possible cause is terminated coroutine's main routine has already returned.", 103 src->name, src, dst->name, dst ); 104 105 // set last resumer 106 dst->last = src; 107 } // if 108 109 // always done for performance testing 110 corCxtSw( src, dst ); 111 } 112 113 #endif //COROUTINES_H 114 115 // Local Variables: // 116 // mode: c // 117 // tab-width: 4 // 118 // End: //
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