source: libcfa/src/concurrency/thread.cfa @ e0c072c

ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationnew-ast-unique-exprpthread-emulationqualifiedEnum
Last change on this file since e0c072c was fd54fef, checked in by Michael Brooks <mlbrooks@…>, 3 years ago

Converting the project to use the new syntax for otype, dtype and ttytpe.

Changed prelude (gen), libcfa and test suite to use it. Added a simple deprecation rule of the old syntax to the parser; we might wish to support both syntaxes "officially," like with an extra CLI switch, but this measure should serve as a simple reminder for our team to try the new syntax.

  • Property mode set to 100644
File size: 4.8 KB
RevLine 
[78b3f52]1//
2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
[75a17f1]7// thread.c --
[78b3f52]8//
9// Author           : Thierry Delisle
[f07e037]10// Created On       : Tue Jan 17 12:27:26 2017
[6b0b624]11// Last Modified By : Peter A. Buhr
[121be3e]12// Last Modified On : Wed Dec  4 09:17:49 2019
13// Update Count     : 9
[78b3f52]14//
15
[2026bb6]16#define __cforall_thread__
17
[58b6d1b]18#include "thread.hfa"
[78b3f52]19
[73abe95]20#include "kernel_private.hfa"
[ab8c6a6]21#include "exception.hfa"
[8118303]22
23#define __CFA_INVOKE_PRIVATE__
24#include "invoke.h"
25
26//-----------------------------------------------------------------------------
27// Thread ctors and dtors
[ac2b598]28void ?{}($thread & this, const char * const name, cluster & cl, void * storage, size_t storageSize ) with( this ) {
[121be3e]29        context{ 0p, 0p };
[de6319f]30        self_cor{ name, storage, storageSize };
[6a77224]31        ticket = TICKET_RUNNING;
[e8e457e]32        state = Start;
[3381ed7]33        preempted = __NO_PREEMPTION;
[82c948c]34        curr_cor = &self_cor;
[65deb18]35        self_mon.owner = &this;
36        self_mon.recursion = 1;
37        self_mon_p = &self_mon;
[de6319f]38        curr_cluster = &cl;
[b798713]39        link.next = 0p;
40        link.prev = 0p;
[d72c074]41        link.preferred = -1;
[b4b63e8]42        #if defined( __CFA_WITH_VERIFY__ )
[ac12f1f]43                canary = 0x0D15EA5E0D15EA5Ep;
[b4b63e8]44        #endif
[de94a60]45
[c131a02]46        seqable.next = 0p;
47        seqable.back = 0p;
48
[121be3e]49        node.next = 0p;
50        node.prev = 0p;
[a1a17a7]51        doregister(curr_cluster, this);
[5ea06d6]52
[65deb18]53        monitors{ &self_mon_p, 1, (fptr_t)0 };
[8118303]54}
55
[ac2b598]56void ^?{}($thread& this) with( this ) {
[b4b63e8]57        #if defined( __CFA_WITH_VERIFY__ )
[ac12f1f]58                canary = 0xDEADDEADDEADDEADp;
[b4b63e8]59        #endif
[a1a17a7]60        unregister(curr_cluster, this);
[65deb18]61        ^self_cor{};
[8118303]62}
63
[fd54fef]64FORALL_DATA_INSTANCE(ThreadCancelled, (thread_t &), (thread_t))
[ab8c6a6]65
[fd54fef]66forall(T &)
[ab8c6a6]67void copy(ThreadCancelled(T) * dst, ThreadCancelled(T) * src) {
68        dst->virtual_table = src->virtual_table;
69        dst->the_thread = src->the_thread;
70        dst->the_exception = src->the_exception;
71}
72
[fd54fef]73forall(T &)
[ab8c6a6]74const char * msg(ThreadCancelled(T) *) {
75        return "ThreadCancelled";
76}
77
[fd54fef]78forall(T &)
[ab8c6a6]79static void default_thread_cancel_handler(ThreadCancelled(T) & ) {
80        abort( "Unhandled thread cancellation.\n" );
81}
82
[fd54fef]83forall(T & | is_thread(T) | IS_EXCEPTION(ThreadCancelled, (T)))
[ab8c6a6]84void ?{}( thread_dtor_guard_t & this,
[fcd0b9d7]85                T & thrd, void(*cancelHandler)(ThreadCancelled(T) &)) {
86        $monitor * m = get_monitor(thrd);
[3ea8ad1]87        $thread * desc = get_thread(thrd);
88
89        // Setup the monitor guard
[ab8c6a6]90        void (*dtor)(T& mutex this) = ^?{};
[fcd0b9d7]91        bool join = cancelHandler != (void(*)(ThreadCancelled(T)&))0;
[ab8c6a6]92        (this.mg){&m, (void(*)())dtor, join};
[342be43]93
[3ea8ad1]94
95        /* paranoid */ verifyf( Halted == desc->state || Cancelled == desc->state, "Expected thread to be Halted or Cancelled, was %d\n", (int)desc->state );
96
[342be43]97        // After the guard set-up and any wait, check for cancellation.
98        struct _Unwind_Exception * cancellation = desc->self_cor.cancellation;
99        if ( likely( 0p == cancellation ) ) {
100                return;
101        } else if ( Cancelled == desc->state ) {
102                return;
103        }
104        desc->state = Cancelled;
[fcd0b9d7]105        void(*defaultResumptionHandler)(ThreadCancelled(T) &) =
106                join ? cancelHandler : default_thread_cancel_handler;
[342be43]107
108        ThreadCancelled(T) except;
109        // TODO: Remove explitate vtable set once trac#186 is fixed.
110        except.virtual_table = &get_exception_vtable(&except);
111        except.the_thread = &thrd;
112        except.the_exception = __cfaehm_cancellation_exception( cancellation );
113        throwResume except;
114
115        except.the_exception->virtual_table->free( except.the_exception );
116        free( cancellation );
117        desc->self_cor.cancellation = 0p;
[ab8c6a6]118}
119
120void ^?{}( thread_dtor_guard_t & this ) {
121        ^(this.mg){};
122}
123
[8118303]124//-----------------------------------------------------------------------------
125// Starting and stopping threads
[fd54fef]126forall( T & | is_thread(T) )
[09f357ec]127void __thrd_start( T & this, void (*main_p)(T &) ) {
[ac2b598]128        $thread * this_thrd = get_thread(this);
[8118303]129
[1c273d0]130        disable_interrupts();
[c7a900a]131        __cfactx_start(main_p, get_coroutine(this), this, __cfactx_invoke_thread);
[09f357ec]132
[e8e457e]133        this_thrd->context.[SP, FP] = this_thrd->self_cor.context.[SP, FP];
[ac5816d]134        /* paranoid */ verify( this_thrd->context.SP );
[8118303]135
[e873838]136        __schedule_thread( this_thrd );
[36982fc]137        enable_interrupts( __cfaabi_dbg_ctx );
[8118303]138}
139
[8c50aed]140//-----------------------------------------------------------------------------
141// Support for threads that don't ues the thread keyword
[fd54fef]142forall( T & | sized(T) | is_thread(T) | { void ?{}(T&); } )
[65deb18]143void ?{}( scoped(T)& this ) with( this ) {
144        handle{};
[09f357ec]145        __thrd_start(handle, main);
[bd98b58]146}
147
[fd54fef]148forall( T &, P... | sized(T) | is_thread(T) | { void ?{}(T&, P); } )
[65deb18]149void ?{}( scoped(T)& this, P params ) with( this ) {
150        handle{ params };
[09f357ec]151        __thrd_start(handle, main);
[8118303]152}
153
[fd54fef]154forall( T & | sized(T) | is_thread(T) )
[65deb18]155void ^?{}( scoped(T)& this ) with( this ) {
156        ^handle{};
[44264c5]157}
158
[ab8c6a6]159//-----------------------------------------------------------------------------
[fd54fef]160forall(T & | is_thread(T) | IS_RESUMPTION_EXCEPTION(ThreadCancelled, (T)))
[ab8c6a6]161T & join( T & this ) {
162        thread_dtor_guard_t guard = { this, defaultResumptionHandler };
163        return this;
164}
165
[fe9468e2]166uint64_t thread_rand() {
167        disable_interrupts();
168        uint64_t ret = __tls_rand();
169        enable_interrupts( __cfaabi_dbg_ctx );
170        return ret;
171}
172
[78b3f52]173// Local Variables: //
174// mode: c //
175// tab-width: 4 //
[6a3d2e7]176// End: //
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