[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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[121be3e] | 12 | // Last Modified On : Wed Dec 4 09:17:49 2019
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| 13 | // Update Count : 9
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[78b3f52] | 14 | //
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| 15 |
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[2026bb6] | 16 | #define __cforall_thread__
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| 17 |
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[58b6d1b] | 18 | #include "thread.hfa"
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[78b3f52] | 19 |
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[73abe95] | 20 | #include "kernel_private.hfa"
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[ab8c6a6] | 21 | #include "exception.hfa"
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[8118303] | 22 |
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| 23 | #define __CFA_INVOKE_PRIVATE__
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| 24 | #include "invoke.h"
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| 25 |
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| 26 | //-----------------------------------------------------------------------------
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| 27 | // Thread ctors and dtors
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[ac2b598] | 28 | void ?{}($thread & this, const char * const name, cluster & cl, void * storage, size_t storageSize ) with( this ) {
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[121be3e] | 29 | context{ 0p, 0p };
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[de6319f] | 30 | self_cor{ name, storage, storageSize };
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[6a77224] | 31 | ticket = TICKET_RUNNING;
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[e8e457e] | 32 | state = Start;
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[3381ed7] | 33 | preempted = __NO_PREEMPTION;
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[82c948c] | 34 | curr_cor = &self_cor;
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[65deb18] | 35 | self_mon.owner = &this;
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| 36 | self_mon.recursion = 1;
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| 37 | self_mon_p = &self_mon;
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[de6319f] | 38 | curr_cluster = &cl;
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[b798713] | 39 | link.next = 0p;
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| 40 | link.prev = 0p;
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[d72c074] | 41 | link.preferred = -1;
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[b4b63e8] | 42 | #if defined( __CFA_WITH_VERIFY__ )
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[ac12f1f] | 43 | canary = 0x0D15EA5E0D15EA5Ep;
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[b4b63e8] | 44 | #endif
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[de94a60] | 45 |
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[121be3e] | 46 | node.next = 0p;
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| 47 | node.prev = 0p;
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[a1a17a74] | 48 | doregister(curr_cluster, this);
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[5ea06d6] | 49 |
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[65deb18] | 50 | monitors{ &self_mon_p, 1, (fptr_t)0 };
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[8118303] | 51 | }
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| 52 |
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[ac2b598] | 53 | void ^?{}($thread& this) with( this ) {
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[b4b63e8] | 54 | #if defined( __CFA_WITH_VERIFY__ )
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[ac12f1f] | 55 | canary = 0xDEADDEADDEADDEADp;
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[b4b63e8] | 56 | #endif
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[a1a17a74] | 57 | unregister(curr_cluster, this);
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[65deb18] | 58 | ^self_cor{};
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[8118303] | 59 | }
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| 60 |
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[ab8c6a6] | 61 | FORALL_DATA_INSTANCE(ThreadCancelled, (dtype thread_t), (thread_t))
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| 62 |
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| 63 | forall(dtype T)
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| 64 | void copy(ThreadCancelled(T) * dst, ThreadCancelled(T) * src) {
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| 65 | dst->virtual_table = src->virtual_table;
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| 66 | dst->the_thread = src->the_thread;
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| 67 | dst->the_exception = src->the_exception;
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| 68 | }
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| 69 |
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| 70 | forall(dtype T)
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| 71 | const char * msg(ThreadCancelled(T) *) {
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| 72 | return "ThreadCancelled";
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| 73 | }
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| 74 |
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| 75 | forall(dtype T)
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| 76 | static void default_thread_cancel_handler(ThreadCancelled(T) & ) {
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| 77 | abort( "Unhandled thread cancellation.\n" );
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| 78 | }
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| 79 |
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| 80 | forall(dtype T | is_thread(T) | IS_EXCEPTION(ThreadCancelled, (T)))
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| 81 | void ?{}( thread_dtor_guard_t & this,
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| 82 | T & thrd, void(*defaultResumptionHandler)(ThreadCancelled(T) &)) {
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| 83 | $monitor * m = get_monitor(thrd);
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[3ea8ad1] | 84 | $thread * desc = get_thread(thrd);
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| 85 |
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| 86 | // Setup the monitor guard
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[ab8c6a6] | 87 | void (*dtor)(T& mutex this) = ^?{};
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| 88 | bool join = defaultResumptionHandler != (void(*)(ThreadCancelled(T)&))0;
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| 89 | (this.mg){&m, (void(*)())dtor, join};
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[342be43] | 90 |
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[3ea8ad1] | 91 |
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| 92 | /* paranoid */ verifyf( Halted == desc->state || Cancelled == desc->state, "Expected thread to be Halted or Cancelled, was %d\n", (int)desc->state );
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| 93 |
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[342be43] | 94 | // After the guard set-up and any wait, check for cancellation.
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| 95 | struct _Unwind_Exception * cancellation = desc->self_cor.cancellation;
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| 96 | if ( likely( 0p == cancellation ) ) {
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| 97 | return;
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| 98 | } else if ( Cancelled == desc->state ) {
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| 99 | return;
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| 100 | }
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| 101 | desc->state = Cancelled;
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| 102 | if (!join) {
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| 103 | defaultResumptionHandler = default_thread_cancel_handler;
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[ab8c6a6] | 104 | }
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[342be43] | 105 |
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| 106 | ThreadCancelled(T) except;
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| 107 | // TODO: Remove explitate vtable set once trac#186 is fixed.
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| 108 | except.virtual_table = &get_exception_vtable(&except);
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| 109 | except.the_thread = &thrd;
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| 110 | except.the_exception = __cfaehm_cancellation_exception( cancellation );
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| 111 | throwResume except;
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| 112 |
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| 113 | except.the_exception->virtual_table->free( except.the_exception );
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| 114 | free( cancellation );
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| 115 | desc->self_cor.cancellation = 0p;
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[ab8c6a6] | 116 | }
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| 117 |
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| 118 | void ^?{}( thread_dtor_guard_t & this ) {
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| 119 | ^(this.mg){};
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| 120 | }
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| 121 |
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[8118303] | 122 | //-----------------------------------------------------------------------------
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| 123 | // Starting and stopping threads
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[0c92c9f] | 124 | forall( dtype T | is_thread(T) )
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[09f357ec] | 125 | void __thrd_start( T & this, void (*main_p)(T &) ) {
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[ac2b598] | 126 | $thread * this_thrd = get_thread(this);
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[8118303] | 127 |
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[1c273d0] | 128 | disable_interrupts();
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[c7a900a] | 129 | __cfactx_start(main_p, get_coroutine(this), this, __cfactx_invoke_thread);
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[09f357ec] | 130 |
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[e8e457e] | 131 | this_thrd->context.[SP, FP] = this_thrd->self_cor.context.[SP, FP];
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| 132 | verify( this_thrd->context.SP );
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[8118303] | 133 |
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[e873838] | 134 | __schedule_thread( this_thrd );
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[36982fc] | 135 | enable_interrupts( __cfaabi_dbg_ctx );
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[8118303] | 136 | }
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| 137 |
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[8c50aed] | 138 | //-----------------------------------------------------------------------------
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| 139 | // Support for threads that don't ues the thread keyword
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[242a902] | 140 | forall( dtype T | sized(T) | is_thread(T) | { void ?{}(T&); } )
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[65deb18] | 141 | void ?{}( scoped(T)& this ) with( this ) {
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| 142 | handle{};
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[09f357ec] | 143 | __thrd_start(handle, main);
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[bd98b58] | 144 | }
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| 145 |
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[242a902] | 146 | forall( dtype T, ttype P | sized(T) | is_thread(T) | { void ?{}(T&, P); } )
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[65deb18] | 147 | void ?{}( scoped(T)& this, P params ) with( this ) {
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| 148 | handle{ params };
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[09f357ec] | 149 | __thrd_start(handle, main);
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[8118303] | 150 | }
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| 151 |
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[9f1695b] | 152 | forall( dtype T | sized(T) | is_thread(T) )
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[65deb18] | 153 | void ^?{}( scoped(T)& this ) with( this ) {
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| 154 | ^handle{};
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[44264c5] | 155 | }
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| 156 |
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[ab8c6a6] | 157 | //-----------------------------------------------------------------------------
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| 158 | forall(dtype T | is_thread(T) | IS_RESUMPTION_EXCEPTION(ThreadCancelled, (T)))
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| 159 | T & join( T & this ) {
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| 160 | thread_dtor_guard_t guard = { this, defaultResumptionHandler };
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| 161 | return this;
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| 162 | }
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| 163 |
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[fe9468e2] | 164 | uint64_t thread_rand() {
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| 165 | disable_interrupts();
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| 166 | uint64_t ret = __tls_rand();
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| 167 | enable_interrupts( __cfaabi_dbg_ctx );
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| 168 | return ret;
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| 169 | }
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| 170 |
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[78b3f52] | 171 | // Local Variables: //
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| 172 | // mode: c //
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| 173 | // tab-width: 4 //
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[6a3d2e7] | 174 | // End: //
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