source: libcfa/src/concurrency/thread.cfa @ fd54fef

arm-ehjacob/cs343-translationnew-ast-unique-expr
Last change on this file since fd54fef was fd54fef, checked in by Michael Brooks <mlbrooks@…>, 9 months 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
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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//
7// thread.c --
8//
9// Author           : Thierry Delisle
10// Created On       : Tue Jan 17 12:27:26 2017
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Wed Dec  4 09:17:49 2019
13// Update Count     : 9
14//
15
16#define __cforall_thread__
17
18#include "thread.hfa"
19
20#include "kernel_private.hfa"
21#include "exception.hfa"
22
23#define __CFA_INVOKE_PRIVATE__
24#include "invoke.h"
25
26//-----------------------------------------------------------------------------
27// Thread ctors and dtors
28void ?{}($thread & this, const char * const name, cluster & cl, void * storage, size_t storageSize ) with( this ) {
29        context{ 0p, 0p };
30        self_cor{ name, storage, storageSize };
31        ticket = TICKET_RUNNING;
32        state = Start;
33        preempted = __NO_PREEMPTION;
34        curr_cor = &self_cor;
35        self_mon.owner = &this;
36        self_mon.recursion = 1;
37        self_mon_p = &self_mon;
38        curr_cluster = &cl;
39        link.next = 0p;
40        link.prev = 0p;
41        link.preferred = -1;
42        #if defined( __CFA_WITH_VERIFY__ )
43                canary = 0x0D15EA5E0D15EA5Ep;
44        #endif
45
46        seqable.next = 0p;
47        seqable.back = 0p;
48
49        node.next = 0p;
50        node.prev = 0p;
51        doregister(curr_cluster, this);
52
53        monitors{ &self_mon_p, 1, (fptr_t)0 };
54}
55
56void ^?{}($thread& this) with( this ) {
57        #if defined( __CFA_WITH_VERIFY__ )
58                canary = 0xDEADDEADDEADDEADp;
59        #endif
60        unregister(curr_cluster, this);
61        ^self_cor{};
62}
63
64FORALL_DATA_INSTANCE(ThreadCancelled, (thread_t &), (thread_t))
65
66forall(T &)
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
73forall(T &)
74const char * msg(ThreadCancelled(T) *) {
75        return "ThreadCancelled";
76}
77
78forall(T &)
79static void default_thread_cancel_handler(ThreadCancelled(T) & ) {
80        abort( "Unhandled thread cancellation.\n" );
81}
82
83forall(T & | is_thread(T) | IS_EXCEPTION(ThreadCancelled, (T)))
84void ?{}( thread_dtor_guard_t & this,
85                T & thrd, void(*cancelHandler)(ThreadCancelled(T) &)) {
86        $monitor * m = get_monitor(thrd);
87        $thread * desc = get_thread(thrd);
88
89        // Setup the monitor guard
90        void (*dtor)(T& mutex this) = ^?{};
91        bool join = cancelHandler != (void(*)(ThreadCancelled(T)&))0;
92        (this.mg){&m, (void(*)())dtor, join};
93
94
95        /* paranoid */ verifyf( Halted == desc->state || Cancelled == desc->state, "Expected thread to be Halted or Cancelled, was %d\n", (int)desc->state );
96
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;
105        void(*defaultResumptionHandler)(ThreadCancelled(T) &) =
106                join ? cancelHandler : default_thread_cancel_handler;
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;
118}
119
120void ^?{}( thread_dtor_guard_t & this ) {
121        ^(this.mg){};
122}
123
124//-----------------------------------------------------------------------------
125// Starting and stopping threads
126forall( T & | is_thread(T) )
127void __thrd_start( T & this, void (*main_p)(T &) ) {
128        $thread * this_thrd = get_thread(this);
129
130        disable_interrupts();
131        __cfactx_start(main_p, get_coroutine(this), this, __cfactx_invoke_thread);
132
133        this_thrd->context.[SP, FP] = this_thrd->self_cor.context.[SP, FP];
134        /* paranoid */ verify( this_thrd->context.SP );
135
136        __schedule_thread( this_thrd );
137        enable_interrupts( __cfaabi_dbg_ctx );
138}
139
140//-----------------------------------------------------------------------------
141// Support for threads that don't ues the thread keyword
142forall( T & | sized(T) | is_thread(T) | { void ?{}(T&); } )
143void ?{}( scoped(T)& this ) with( this ) {
144        handle{};
145        __thrd_start(handle, main);
146}
147
148forall( T &, P... | sized(T) | is_thread(T) | { void ?{}(T&, P); } )
149void ?{}( scoped(T)& this, P params ) with( this ) {
150        handle{ params };
151        __thrd_start(handle, main);
152}
153
154forall( T & | sized(T) | is_thread(T) )
155void ^?{}( scoped(T)& this ) with( this ) {
156        ^handle{};
157}
158
159//-----------------------------------------------------------------------------
160forall(T & | is_thread(T) | IS_RESUMPTION_EXCEPTION(ThreadCancelled, (T)))
161T & join( T & this ) {
162        thread_dtor_guard_t guard = { this, defaultResumptionHandler };
163        return this;
164}
165
166uint64_t thread_rand() {
167        disable_interrupts();
168        uint64_t ret = __tls_rand();
169        enable_interrupts( __cfaabi_dbg_ctx );
170        return ret;
171}
172
173// Local Variables: //
174// mode: c //
175// tab-width: 4 //
176// End: //
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