[78b3f52] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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[75a17f1] | 7 | // thread.c -- |
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[78b3f52] | 8 | // |
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| 9 | // Author : Thierry Delisle |
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[f07e037] | 10 | // Created On : Tue Jan 17 12:27:26 2017 |
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[6b0b624] | 11 | // Last Modified By : Peter A. Buhr |
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| 12 | // Last Modified On : Fri Jul 21 22:34:46 2017 |
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| 13 | // Update Count : 1 |
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[78b3f52] | 14 | // |
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| 15 | |
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[75a17f1] | 16 | #include "thread" |
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[78b3f52] | 17 | |
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[75f3522] | 18 | #include "kernel_private.h" |
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[8118303] | 19 | #include "libhdr.h" |
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| 20 | |
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| 21 | #define __CFA_INVOKE_PRIVATE__ |
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| 22 | #include "invoke.h" |
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| 23 | |
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[bd98b58] | 24 | extern "C" { |
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[8fcbb4c] | 25 | #include <fenv.h> |
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[bd98b58] | 26 | #include <stddef.h> |
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| 27 | } |
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| 28 | |
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[4e6fb8e] | 29 | extern volatile thread_local processor * this_processor; |
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[8118303] | 30 | |
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| 31 | //----------------------------------------------------------------------------- |
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| 32 | // Thread ctors and dtors |
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| 33 | |
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[242a902] | 34 | void ?{}(thread_desc& this) { |
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| 35 | (this.cor){}; |
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| 36 | this.cor.name = "Anonymous Coroutine"; |
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[53a8e68] | 37 | this.mon.owner = &this; |
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[242a902] | 38 | this.mon.recursion = 1; |
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| 39 | this.next = NULL; |
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[5ea06d6] | 40 | |
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[242a902] | 41 | this.current_monitors = &this.mon; |
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| 42 | this.current_monitor_count = 1; |
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[8118303] | 43 | } |
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| 44 | |
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[242a902] | 45 | void ^?{}(thread_desc& this) { |
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| 46 | ^(this.cor){}; |
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[8118303] | 47 | } |
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| 48 | |
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[242a902] | 49 | forall( dtype T | sized(T) | is_thread(T) | { void ?{}(T&); } ) |
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| 50 | void ?{}( scoped(T)& this ) { |
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| 51 | (this.handle){}; |
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[83a071f9] | 52 | __thrd_start(this.handle); |
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[8118303] | 53 | } |
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| 54 | |
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[242a902] | 55 | forall( dtype T, ttype P | sized(T) | is_thread(T) | { void ?{}(T&, P); } ) |
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| 56 | void ?{}( scoped(T)& this, P params ) { |
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| 57 | (this.handle){ params }; |
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[83a071f9] | 58 | __thrd_start(this.handle); |
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[8118303] | 59 | } |
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| 60 | |
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[9f1695b] | 61 | forall( dtype T | sized(T) | is_thread(T) ) |
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[242a902] | 62 | void ^?{}( scoped(T)& this ) { |
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| 63 | ^(this.handle){}; |
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[8118303] | 64 | } |
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| 65 | |
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| 66 | //----------------------------------------------------------------------------- |
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| 67 | // Starting and stopping threads |
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[0c92c9f] | 68 | forall( dtype T | is_thread(T) ) |
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[83a071f9] | 69 | void __thrd_start( T& this ) { |
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[c3acb841] | 70 | coroutine_desc* thrd_c = get_coroutine(this); |
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[348006f] | 71 | thread_desc* thrd_h = get_thread (this); |
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[1c273d0] | 72 | thrd_c->last = this_coroutine; |
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[8118303] | 73 | |
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[1c273d0] | 74 | // LIB_DEBUG_PRINT_SAFE("Thread start : %p (t %p, c %p)\n", this, thrd_c, thrd_h); |
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[8118303] | 75 | |
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[1c273d0] | 76 | disable_interrupts(); |
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[8118303] | 77 | create_stack(&thrd_c->stack, thrd_c->stack.size); |
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[1c273d0] | 78 | this_coroutine = thrd_c; |
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[83a071f9] | 79 | CtxStart(&this, CtxInvokeThread); |
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[1c273d0] | 80 | assert( thrd_c->last->stack.context ); |
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[8118303] | 81 | CtxSwitch( thrd_c->last->stack.context, thrd_c->stack.context ); |
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| 82 | |
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[75f3522] | 83 | ScheduleThread(thrd_h); |
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[2ac095d] | 84 | enable_interrupts( DEBUG_CTX ); |
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[8118303] | 85 | } |
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| 86 | |
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[bd98b58] | 87 | void yield( void ) { |
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[3175147] | 88 | BlockInternal( this_thread ); |
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[bd98b58] | 89 | } |
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| 90 | |
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[44264c5] | 91 | void yield( unsigned times ) { |
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| 92 | for( unsigned i = 0; i < times; i++ ) { |
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| 93 | yield(); |
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| 94 | } |
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| 95 | } |
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| 96 | |
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[c3acb841] | 97 | void ThreadCtxSwitch(coroutine_desc* src, coroutine_desc* dst) { |
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[0c92c9f] | 98 | // set state of current coroutine to inactive |
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[1c273d0] | 99 | src->state = src->state == Halted ? Halted : Inactive; |
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[75f3522] | 100 | dst->state = Active; |
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[0c92c9f] | 101 | |
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[75f3522] | 102 | //update the last resumer |
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| 103 | dst->last = src; |
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[0c92c9f] | 104 | |
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[75f3522] | 105 | // set new coroutine that the processor is executing |
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| 106 | // and context switch to it |
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[1c273d0] | 107 | this_coroutine = dst; |
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| 108 | assert( src->stack.context ); |
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[0c92c9f] | 109 | CtxSwitch( src->stack.context, dst->stack.context ); |
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[1c273d0] | 110 | this_coroutine = src; |
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[0c92c9f] | 111 | |
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| 112 | // set state of new coroutine to active |
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[1c273d0] | 113 | dst->state = dst->state == Halted ? Halted : Inactive; |
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[0c92c9f] | 114 | src->state = Active; |
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| 115 | } |
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| 116 | |
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[78b3f52] | 117 | // Local Variables: // |
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| 118 | // mode: c // |
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| 119 | // tab-width: 4 // |
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[6a3d2e7] | 120 | // End: // |
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