source: libcfa/src/concurrency/thread.cfa @ 9cc3a18

arm-ehjacob/cs343-translationnew-ast-unique-expr
Last change on this file since 9cc3a18 was 9cc3a18, checked in by Thierry Delisle <tdelisle@…>, 6 months ago

Major clean-up before attempting to add new scheduler

  • Property mode set to 100644
File size: 5.0 KB
Line 
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 ?{}($thread & this, const char * const name, cluster & cl, void * storage, size_t storageSize ) with( this ) {
29        context{ 0p, 0p };
30        self_cor{ name, storage, storageSize };
31        ticket = TICKET_RUNNING;
32        state = Start;
33        preempted = __NO_PREEMPTION;
34        curr_cor = &self_cor;
35        self_mon.owner = &this;
36        self_mon.recursion = 1;
37        self_mon_p = &self_mon;
38        curr_cluster = &cl;
39        link.next = 0p;
40        link.prev = 0p;
41        #if defined( __CFA_WITH_VERIFY__ )
42                canary = 0x0D15EA5E0D15EA5Ep;
43        #endif
44
45        seqable.next = 0p;
46        seqable.back = 0p;
47
48        node.next = 0p;
49        node.prev = 0p;
50        doregister(curr_cluster, this);
51
52        monitors{ &self_mon_p, 1, (fptr_t)0 };
53}
54
55void ^?{}($thread& this) with( this ) {
56        #if defined( __CFA_WITH_VERIFY__ )
57                canary = 0xDEADDEADDEADDEADp;
58        #endif
59        unregister(curr_cluster, this);
60        ^self_cor{};
61}
62
63EHM_VIRTUAL_TABLE(SomeThreadCancelled, std_thread_cancelled);
64
65forall(T &)
66void copy(ThreadCancelled(T) * dst, ThreadCancelled(T) * src) {
67        dst->virtual_table = src->virtual_table;
68        dst->the_thread = src->the_thread;
69        dst->the_exception = src->the_exception;
70}
71
72forall(T &)
73const char * msg(ThreadCancelled(T) *) {
74        return "ThreadCancelled(...)";
75}
76
77forall(T &)
78static void default_thread_cancel_handler(ThreadCancelled(T) & ) {
79        // Improve this error message, can I do formatting?
80        abort( "Unhandled thread cancellation.\n" );
81}
82
83static void default_thread_cancel_handler(SomeThreadCancelled & ) {
84        // Improve this error message, can I do formatting?
85        abort( "Unhandled thread cancellation.\n" );
86}
87
88forall(T & | is_thread(T) | IS_EXCEPTION(SomeThreadCancelled))
89void ?{}( thread_dtor_guard_t & this,
90                T & thrd, void(*cancelHandler)(SomeThreadCancelled &)) {
91        $monitor * m = get_monitor(thrd);
92        $thread * desc = get_thread(thrd);
93
94        // Setup the monitor guard
95        void (*dtor)(T& mutex this) = ^?{};
96        bool join = cancelHandler != (void(*)(SomeThreadCancelled&))0;
97        (this.mg){&m, (void(*)())dtor, join};
98
99
100        /* paranoid */ verifyf( Halted == desc->state || Cancelled == desc->state, "Expected thread to be Halted or Cancelled, was %d\n", (int)desc->state );
101
102        // After the guard set-up and any wait, check for cancellation.
103        struct _Unwind_Exception * cancellation = desc->self_cor.cancellation;
104        if ( likely( 0p == cancellation ) ) {
105                return;
106        } else if ( Cancelled == desc->state ) {
107                return;
108        }
109        desc->state = Cancelled;
110        void(*defaultResumptionHandler)(SomeThreadCancelled &) =
111                join ? cancelHandler : default_thread_cancel_handler;
112
113        // TODO: Remove explitate vtable set once trac#186 is fixed.
114        SomeThreadCancelled except;
115        except.virtual_table = &std_thread_cancelled;
116        except.the_thread = &thrd;
117        except.the_exception = __cfaehm_cancellation_exception( cancellation );
118        // Why is this cast required?
119        throwResume (SomeThreadCancelled &)except;
120
121        except.the_exception->virtual_table->free( except.the_exception );
122        free( cancellation );
123        desc->self_cor.cancellation = 0p;
124}
125
126void ^?{}( thread_dtor_guard_t & this ) {
127        ^(this.mg){};
128}
129
130//-----------------------------------------------------------------------------
131// Starting and stopping threads
132forall( T & | is_thread(T) )
133void __thrd_start( T & this, void (*main_p)(T &) ) {
134        $thread * this_thrd = get_thread(this);
135
136        disable_interrupts();
137        __cfactx_start(main_p, get_coroutine(this), this, __cfactx_invoke_thread);
138
139        this_thrd->context.[SP, FP] = this_thrd->self_cor.context.[SP, FP];
140        /* paranoid */ verify( this_thrd->context.SP );
141
142        __schedule_thread( this_thrd );
143        enable_interrupts( __cfaabi_dbg_ctx );
144}
145
146//-----------------------------------------------------------------------------
147// Support for threads that don't ues the thread keyword
148forall( T & | sized(T) | is_thread(T) | { void ?{}(T&); } )
149void ?{}( scoped(T)& this ) with( this ) {
150        handle{};
151        __thrd_start(handle, main);
152}
153
154forall( T &, P... | sized(T) | is_thread(T) | { void ?{}(T&, P); } )
155void ?{}( scoped(T)& this, P params ) with( this ) {
156        handle{ params };
157        __thrd_start(handle, main);
158}
159
160forall( T & | sized(T) | is_thread(T) )
161void ^?{}( scoped(T)& this ) with( this ) {
162        ^handle{};
163}
164
165//-----------------------------------------------------------------------------
166forall(T & | is_thread(T) | IS_RESUMPTION_EXCEPTION(SomeThreadCancelled))
167T & join( T & this ) {
168        thread_dtor_guard_t guard = { this, defaultResumptionHandler };
169        return this;
170}
171
172uint64_t thread_rand() {
173        disable_interrupts();
174        uint64_t ret = __tls_rand();
175        enable_interrupts( __cfaabi_dbg_ctx );
176        return ret;
177}
178
179// Local Variables: //
180// mode: c //
181// tab-width: 4 //
182// End: //
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