source: libcfa/src/concurrency/thread.cfa @ d874f59

jacob/cs343-translationnew-ast-unique-expr
Last change on this file since d874f59 was d874f59, checked in by Thierry Delisle <tdelisle@…>, 4 months ago

Fixed crash from get_cpu

  • 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#define _GNU_SOURCE
18
19#include "thread.hfa"
20
21#include "kernel_private.hfa"
22#include "exception.hfa"
23
24#define __CFA_INVOKE_PRIVATE__
25#include "invoke.h"
26
27//-----------------------------------------------------------------------------
28// Thread ctors and dtors
29void ?{}(thread$ & this, const char * const name, cluster & cl, void * storage, size_t storageSize ) with( this ) {
30        context{ 0p, 0p };
31        self_cor{ name, storage, storageSize };
32        ticket = TICKET_RUNNING;
33        state = Start;
34        preempted = __NO_PREEMPTION;
35        corctx_flag = false;
36        disable_interrupts();
37        last_cpu = __kernel_getcpu();
38        enable_interrupts();
39        curr_cor = &self_cor;
40        self_mon.owner = &this;
41        self_mon.recursion = 1;
42        self_mon_p = &self_mon;
43        curr_cluster = &cl;
44        link.next = 0p;
45        link.ts   = -1llu;
46        preferred = -1u;
47        last_proc = 0p;
48        #if defined( __CFA_WITH_VERIFY__ )
49                canary = 0x0D15EA5E0D15EA5Ep;
50        #endif
51
52        seqable.next = 0p;
53        seqable.back = 0p;
54
55        node.next = 0p;
56        node.prev = 0p;
57        doregister(curr_cluster, this);
58
59        monitors{ &self_mon_p, 1, (fptr_t)0 };
60}
61
62void ^?{}(thread$& this) with( this ) {
63        #if defined( __CFA_WITH_VERIFY__ )
64                canary = 0xDEADDEADDEADDEADp;
65        #endif
66        unregister(curr_cluster, this);
67        ^self_cor{};
68}
69
70forall(T &)
71void copy(ThreadCancelled(T) * dst, ThreadCancelled(T) * src) {
72        dst->virtual_table = src->virtual_table;
73        dst->the_thread = src->the_thread;
74        dst->the_exception = src->the_exception;
75}
76
77forall(T &)
78const char * msg(ThreadCancelled(T) *) {
79        return "ThreadCancelled(...)";
80}
81
82forall(T &)
83static void default_thread_cancel_handler(ThreadCancelled(T) & ) {
84        // Improve this error message, can I do formatting?
85        abort( "Unhandled thread cancellation.\n" );
86}
87
88forall(T & | is_thread(T) | IS_EXCEPTION(ThreadCancelled, (T))
89    | { EHM_DEFAULT_VTABLE(ThreadCancelled, (T)); })
90void ?{}( thread_dtor_guard_t & this,
91                T & thrd, void(*cancelHandler)(ThreadCancelled(T) &)) {
92        monitor$ * m = get_monitor(thrd);
93        thread$ * desc = get_thread(thrd);
94
95        // Setup the monitor guard
96        void (*dtor)(T& mutex this) = ^?{};
97        bool join = cancelHandler != (void(*)(ThreadCancelled(T)&))0;
98        (this.mg){&m, (void(*)())dtor, join};
99
100
101        /* paranoid */ verifyf( Halted == desc->state || Cancelled == desc->state, "Expected thread to be Halted or Cancelled, was %d\n", (int)desc->state );
102
103        // After the guard set-up and any wait, check for cancellation.
104        struct _Unwind_Exception * cancellation = desc->self_cor.cancellation;
105        if ( likely( 0p == cancellation ) ) {
106                return;
107        } else if ( Cancelled == desc->state ) {
108                return;
109        }
110        desc->state = Cancelled;
111        void(*defaultResumptionHandler)(ThreadCancelled(T) &) =
112                join ? cancelHandler : default_thread_cancel_handler;
113
114        // TODO: Remove explitate vtable set once trac#186 is fixed.
115        ThreadCancelled(T) except;
116        except.virtual_table = &_default_vtable;
117        except.the_thread = &thrd;
118        except.the_exception = __cfaehm_cancellation_exception( cancellation );
119        // Why is this cast required?
120        throwResume (ThreadCancelled(T) &)except;
121
122        except.the_exception->virtual_table->free( except.the_exception );
123        free( cancellation );
124        desc->self_cor.cancellation = 0p;
125}
126
127void ^?{}( thread_dtor_guard_t & this ) {
128        ^(this.mg){};
129}
130
131//-----------------------------------------------------------------------------
132// Starting and stopping threads
133forall( T & | is_thread(T) )
134void __thrd_start( T & this, void (*main_p)(T &) ) {
135        thread$ * this_thrd = get_thread(this);
136
137        disable_interrupts();
138        __cfactx_start(main_p, get_coroutine(this), this, __cfactx_invoke_thread);
139
140        this_thrd->context.[SP, FP] = this_thrd->self_cor.context.[SP, FP];
141        /* paranoid */ verify( this_thrd->context.SP );
142
143        schedule_thread$( this_thrd );
144        enable_interrupts();
145}
146
147//-----------------------------------------------------------------------------
148// Support for threads that don't ues the thread keyword
149forall( T & | sized(T) | is_thread(T) | { void ?{}(T&); } )
150void ?{}( scoped(T)& this ) with( this ) {
151        handle{};
152        __thrd_start(handle, main);
153}
154
155forall( T &, P... | sized(T) | is_thread(T) | { void ?{}(T&, P); } )
156void ?{}( scoped(T)& this, P params ) with( this ) {
157        handle{ params };
158        __thrd_start(handle, main);
159}
160
161forall( T & | sized(T) | is_thread(T) )
162void ^?{}( scoped(T)& this ) with( this ) {
163        ^handle{};
164}
165
166//-----------------------------------------------------------------------------
167forall(T & | is_thread(T) | IS_RESUMPTION_EXCEPTION(ThreadCancelled, (T))
168    | { EHM_DEFAULT_VTABLE(ThreadCancelled, (T)); })
169T & join( T & this ) {
170        thread_dtor_guard_t guard = { this, defaultResumptionHandler };
171        return this;
172}
173
174uint64_t thread_rand() {
175        disable_interrupts();
176        uint64_t ret = __tls_rand();
177        enable_interrupts();
178        return ret;
179}
180
181// Local Variables: //
182// mode: c //
183// tab-width: 4 //
184// End: //
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