[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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[b10affd] | 12 | // Last Modified On : Fri Mar 30 17:19:52 2018 |
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| 13 | // Update Count : 8 |
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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 | |
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| 20 | #define __CFA_INVOKE_PRIVATE__ |
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| 21 | #include "invoke.h" |
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| 22 | |
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[bd98b58] | 23 | extern "C" { |
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[8fcbb4c] | 24 | #include <fenv.h> |
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[bd98b58] | 25 | #include <stddef.h> |
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| 26 | } |
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| 27 | |
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[b10affd] | 28 | //extern volatile thread_local processor * this_processor; |
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[8118303] | 29 | |
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| 30 | //----------------------------------------------------------------------------- |
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| 31 | // Thread ctors and dtors |
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[de6319f] | 32 | void ?{}(thread_desc & this, const char * const name, cluster & cl, void * storage, size_t storageSize ) with( this ) { |
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| 33 | self_cor{ name, storage, storageSize }; |
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| 34 | verify(&self_cor); |
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[82c948c] | 35 | curr_cor = &self_cor; |
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[65deb18] | 36 | self_mon.owner = &this; |
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| 37 | self_mon.recursion = 1; |
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| 38 | self_mon_p = &self_mon; |
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[de6319f] | 39 | curr_cluster = &cl; |
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[65deb18] | 40 | next = NULL; |
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[de94a60] | 41 | |
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| 42 | node.next = NULL; |
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| 43 | node.prev = NULL; |
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[a1a17a74] | 44 | doregister(curr_cluster, this); |
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[5ea06d6] | 45 | |
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[65deb18] | 46 | monitors{ &self_mon_p, 1, (fptr_t)0 }; |
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[8118303] | 47 | } |
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| 48 | |
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[65deb18] | 49 | void ^?{}(thread_desc& this) with( this ) { |
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[a1a17a74] | 50 | unregister(curr_cluster, this); |
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[65deb18] | 51 | ^self_cor{}; |
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[8118303] | 52 | } |
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| 53 | |
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[242a902] | 54 | forall( dtype T | sized(T) | is_thread(T) | { void ?{}(T&); } ) |
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[65deb18] | 55 | void ?{}( scoped(T)& this ) with( this ) { |
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| 56 | handle{}; |
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| 57 | __thrd_start(handle); |
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[8118303] | 58 | } |
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| 59 | |
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[242a902] | 60 | forall( dtype T, ttype P | sized(T) | is_thread(T) | { void ?{}(T&, P); } ) |
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[65deb18] | 61 | void ?{}( scoped(T)& this, P params ) with( this ) { |
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| 62 | handle{ params }; |
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| 63 | __thrd_start(handle); |
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[8118303] | 64 | } |
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| 65 | |
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[9f1695b] | 66 | forall( dtype T | sized(T) | is_thread(T) ) |
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[65deb18] | 67 | void ^?{}( scoped(T)& this ) with( this ) { |
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| 68 | ^handle{}; |
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[8118303] | 69 | } |
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| 70 | |
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| 71 | //----------------------------------------------------------------------------- |
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| 72 | // Starting and stopping threads |
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[0c92c9f] | 73 | forall( dtype T | is_thread(T) ) |
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[83a071f9] | 74 | void __thrd_start( T& this ) { |
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[c3acb841] | 75 | coroutine_desc* thrd_c = get_coroutine(this); |
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[65deb18] | 76 | thread_desc * thrd_h = get_thread (this); |
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[b10affd] | 77 | thrd_c->last = TL_GET( this_coroutine ); |
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[8118303] | 78 | |
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[36982fc] | 79 | // __cfaabi_dbg_print_safe("Thread start : %p (t %p, c %p)\n", this, thrd_c, thrd_h); |
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[8118303] | 80 | |
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[1c273d0] | 81 | disable_interrupts(); |
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[8118303] | 82 | create_stack(&thrd_c->stack, thrd_c->stack.size); |
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[14a61b5] | 83 | kernelTLS.this_coroutine = thrd_c; |
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[83a071f9] | 84 | CtxStart(&this, CtxInvokeThread); |
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[1c273d0] | 85 | assert( thrd_c->last->stack.context ); |
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[8118303] | 86 | CtxSwitch( thrd_c->last->stack.context, thrd_c->stack.context ); |
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| 87 | |
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[75f3522] | 88 | ScheduleThread(thrd_h); |
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[36982fc] | 89 | enable_interrupts( __cfaabi_dbg_ctx ); |
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[8118303] | 90 | } |
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| 91 | |
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[b69ea6b] | 92 | extern "C" { |
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[14a61b5] | 93 | // KERNEL ONLY |
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[b69ea6b] | 94 | void __finish_creation(void) { |
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[14a61b5] | 95 | coroutine_desc* thrd_c = kernelTLS.this_coroutine; |
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[b69ea6b] | 96 | ThreadCtxSwitch( thrd_c, thrd_c->last ); |
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| 97 | } |
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| 98 | } |
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| 99 | |
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[bd98b58] | 100 | void yield( void ) { |
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[14a61b5] | 101 | // Safety note : This could cause some false positives due to preemption |
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[afd550c] | 102 | verify( TL_GET( preemption_state.enabled ) ); |
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[b10affd] | 103 | BlockInternal( TL_GET( this_thread ) ); |
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[14a61b5] | 104 | // Safety note : This could cause some false positives due to preemption |
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[afd550c] | 105 | verify( TL_GET( preemption_state.enabled ) ); |
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[bd98b58] | 106 | } |
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| 107 | |
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[44264c5] | 108 | void yield( unsigned times ) { |
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| 109 | for( unsigned i = 0; i < times; i++ ) { |
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| 110 | yield(); |
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| 111 | } |
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| 112 | } |
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| 113 | |
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[14a61b5] | 114 | // KERNEL ONLY |
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[c3acb841] | 115 | void ThreadCtxSwitch(coroutine_desc* src, coroutine_desc* dst) { |
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[0c92c9f] | 116 | // set state of current coroutine to inactive |
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[1c273d0] | 117 | src->state = src->state == Halted ? Halted : Inactive; |
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[75f3522] | 118 | dst->state = Active; |
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[0c92c9f] | 119 | |
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[75f3522] | 120 | // set new coroutine that the processor is executing |
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| 121 | // and context switch to it |
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[14a61b5] | 122 | kernelTLS.this_coroutine = dst; |
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[1c273d0] | 123 | assert( src->stack.context ); |
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[0c92c9f] | 124 | CtxSwitch( src->stack.context, dst->stack.context ); |
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[14a61b5] | 125 | kernelTLS.this_coroutine = src; |
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[0c92c9f] | 126 | |
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| 127 | // set state of new coroutine to active |
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[1c273d0] | 128 | dst->state = dst->state == Halted ? Halted : Inactive; |
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[0c92c9f] | 129 | src->state = Active; |
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| 130 | } |
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| 131 | |
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[78b3f52] | 132 | // Local Variables: // |
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| 133 | // mode: c // |
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| 134 | // tab-width: 4 // |
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[6a3d2e7] | 135 | // End: // |
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