[6a3d2e7] | 1 | // -*- Mode: CFA -*- |
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[78b3f52] | 2 | // |
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| 3 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo |
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| 4 | // |
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| 5 | // The contents of this file are covered under the licence agreement in the |
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| 6 | // file "LICENCE" distributed with Cforall. |
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| 7 | // |
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[75a17f1] | 8 | // thread.c -- |
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[78b3f52] | 9 | // |
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| 10 | // Author : Thierry Delisle |
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[f07e037] | 11 | // Created On : Tue Jan 17 12:27:26 2017 |
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[78b3f52] | 12 | // Last Modified By : Thierry Delisle |
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[6a3d2e7] | 13 | // Last Modified On : -- |
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[78b3f52] | 14 | // Update Count : 0 |
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| 15 | // |
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| 16 | |
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[75a17f1] | 17 | #include "thread" |
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[78b3f52] | 18 | |
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[75f3522] | 19 | #include "kernel_private.h" |
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[8118303] | 20 | #include "libhdr.h" |
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| 21 | |
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| 22 | #define __CFA_INVOKE_PRIVATE__ |
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| 23 | #include "invoke.h" |
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| 24 | |
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[bd98b58] | 25 | extern "C" { |
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[8fcbb4c] | 26 | #include <fenv.h> |
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[bd98b58] | 27 | #include <stddef.h> |
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| 28 | } |
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| 29 | |
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[89a3df5] | 30 | extern thread_local processor * this_processor; |
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[8118303] | 31 | |
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| 32 | //----------------------------------------------------------------------------- |
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| 33 | // Forward declarations |
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[0c92c9f] | 34 | forall( dtype T | is_thread(T) ) |
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[bd98b58] | 35 | void start( T* this ); |
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[8118303] | 36 | |
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[0c92c9f] | 37 | forall( dtype T | is_thread(T) ) |
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[bd98b58] | 38 | void stop( T* this ); |
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[8118303] | 39 | |
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| 40 | //----------------------------------------------------------------------------- |
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| 41 | // Thread ctors and dtors |
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| 42 | |
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[348006f] | 43 | void ?{}(thread_desc* this) { |
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[17af7d1] | 44 | (&this->cor){}; |
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| 45 | this->cor.name = "Anonymous Coroutine"; |
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[cb0e6de] | 46 | this->mon.owner = this; |
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| 47 | this->mon.recursion = 1; |
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[db6f06a] | 48 | (&this->terminated){}; |
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[bd98b58] | 49 | this->next = NULL; |
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[8118303] | 50 | } |
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| 51 | |
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[348006f] | 52 | void ^?{}(thread_desc* this) { |
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[17af7d1] | 53 | ^(&this->cor){}; |
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[8118303] | 54 | } |
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| 55 | |
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[8def349] | 56 | forall( dtype T | sized(T) | is_thread(T) | { void ?{}(T*); } ) |
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[e15df4c] | 57 | void ?{}( scoped(T)* this ) { |
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[8118303] | 58 | (&this->handle){}; |
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[bd98b58] | 59 | start(&this->handle); |
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[8118303] | 60 | } |
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| 61 | |
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[8def349] | 62 | forall( dtype T, ttype P | sized(T) | is_thread(T) | { void ?{}(T*, P); } ) |
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[e15df4c] | 63 | void ?{}( scoped(T)* this, P params ) { |
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[8118303] | 64 | (&this->handle){ params }; |
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[bd98b58] | 65 | start(&this->handle); |
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[8118303] | 66 | } |
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| 67 | |
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[9f1695b] | 68 | forall( dtype T | sized(T) | is_thread(T) ) |
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[e15df4c] | 69 | void ^?{}( scoped(T)* this ) { |
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[bd98b58] | 70 | stop(&this->handle); |
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[8118303] | 71 | ^(&this->handle){}; |
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| 72 | } |
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| 73 | |
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| 74 | //----------------------------------------------------------------------------- |
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| 75 | // Starting and stopping threads |
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[0c92c9f] | 76 | forall( dtype T | is_thread(T) ) |
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[bd98b58] | 77 | void start( T* this ) { |
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[c3acb841] | 78 | coroutine_desc* thrd_c = get_coroutine(this); |
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[348006f] | 79 | thread_desc* thrd_h = get_thread (this); |
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[8118303] | 80 | thrd_c->last = this_coroutine(); |
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[89a3df5] | 81 | this_processor->current_coroutine = thrd_c; |
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[8118303] | 82 | |
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[0c92c9f] | 83 | LIB_DEBUG_PRINTF("Thread start : %p (t %p, c %p)\n", this, thrd_c, thrd_h); |
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[8118303] | 84 | |
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| 85 | create_stack(&thrd_c->stack, thrd_c->stack.size); |
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[bd98b58] | 86 | CtxStart(this, CtxInvokeThread); |
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[8118303] | 87 | CtxSwitch( thrd_c->last->stack.context, thrd_c->stack.context ); |
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| 88 | |
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[75f3522] | 89 | ScheduleThread(thrd_h); |
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[8118303] | 90 | } |
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| 91 | |
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[0c92c9f] | 92 | forall( dtype T | is_thread(T) ) |
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[bd98b58] | 93 | void stop( T* this ) { |
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[cb0e6de] | 94 | // wait( & get_thread(this)->terminated ); |
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[8118303] | 95 | } |
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[9129a84] | 96 | |
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[bd98b58] | 97 | void yield( void ) { |
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[89a3df5] | 98 | ScheduleInternal( this_processor->current_thread ); |
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[bd98b58] | 99 | } |
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| 100 | |
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[c3acb841] | 101 | void ThreadCtxSwitch(coroutine_desc* src, coroutine_desc* dst) { |
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[0c92c9f] | 102 | // set state of current coroutine to inactive |
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| 103 | src->state = Inactive; |
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[75f3522] | 104 | dst->state = Active; |
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[0c92c9f] | 105 | |
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[75f3522] | 106 | //update the last resumer |
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| 107 | dst->last = src; |
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[0c92c9f] | 108 | |
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[75f3522] | 109 | // set new coroutine that the processor is executing |
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| 110 | // and context switch to it |
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[89a3df5] | 111 | this_processor->current_coroutine = dst; |
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[0c92c9f] | 112 | CtxSwitch( src->stack.context, dst->stack.context ); |
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[89a3df5] | 113 | this_processor->current_coroutine = src; |
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[0c92c9f] | 114 | |
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| 115 | // set state of new coroutine to active |
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[75f3522] | 116 | dst->state = Inactive; |
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[0c92c9f] | 117 | src->state = Active; |
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| 118 | } |
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| 119 | |
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[348006f] | 120 | // C Helper to signal the termination of a thread_desc |
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[0c92c9f] | 121 | // Used in invoke.c |
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| 122 | extern "C" { |
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[348006f] | 123 | void __thread_signal_termination( thread_desc * this ) { |
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[17af7d1] | 124 | this->cor.state = Halted; |
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[db6f06a] | 125 | LIB_DEBUG_PRINTF("Thread end : %p\n", this); |
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| 126 | signal( &this->terminated ); |
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[0c92c9f] | 127 | } |
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| 128 | } |
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| 129 | |
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[78b3f52] | 130 | // Local Variables: // |
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| 131 | // mode: c // |
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| 132 | // tab-width: 4 // |
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[6a3d2e7] | 133 | // End: // |
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