[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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[ab5baab] | 34 | corctx_flag = false; |
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[82c948c] | 35 | curr_cor = &self_cor; |
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[65deb18] | 36 | self_mon.owner = &this; |
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| 37 | self_mon.recursion = 1; |
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| 38 | self_mon_p = &self_mon; |
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[de6319f] | 39 | curr_cluster = &cl; |
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[b798713] | 40 | link.next = 0p; |
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[2b96031] | 41 | link.ts = 0; |
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[d3ba775] | 42 | preferred = -1u; |
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[89eff25] | 43 | last_proc = 0p; |
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[b4b63e8] | 44 | #if defined( __CFA_WITH_VERIFY__ ) |
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[ac12f1f] | 45 | canary = 0x0D15EA5E0D15EA5Ep; |
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[b4b63e8] | 46 | #endif |
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[de94a60] | 47 | |
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[c131a02] | 48 | seqable.next = 0p; |
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| 49 | seqable.back = 0p; |
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| 50 | |
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[121be3e] | 51 | node.next = 0p; |
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| 52 | node.prev = 0p; |
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[a1a17a74] | 53 | doregister(curr_cluster, this); |
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[5ea06d6] | 54 | |
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[65deb18] | 55 | monitors{ &self_mon_p, 1, (fptr_t)0 }; |
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[8118303] | 56 | } |
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| 57 | |
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[ac2b598] | 58 | void ^?{}($thread& this) with( this ) { |
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[b4b63e8] | 59 | #if defined( __CFA_WITH_VERIFY__ ) |
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[ac12f1f] | 60 | canary = 0xDEADDEADDEADDEADp; |
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[b4b63e8] | 61 | #endif |
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[a1a17a74] | 62 | unregister(curr_cluster, this); |
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[65deb18] | 63 | ^self_cor{}; |
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[8118303] | 64 | } |
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| 65 | |
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[fd54fef] | 66 | forall(T &) |
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[ab8c6a6] | 67 | void copy(ThreadCancelled(T) * dst, ThreadCancelled(T) * src) { |
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| 68 | dst->virtual_table = src->virtual_table; |
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| 69 | dst->the_thread = src->the_thread; |
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| 70 | dst->the_exception = src->the_exception; |
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| 71 | } |
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| 72 | |
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[fd54fef] | 73 | forall(T &) |
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[ab8c6a6] | 74 | const char * msg(ThreadCancelled(T) *) { |
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[ecfd758] | 75 | return "ThreadCancelled(...)"; |
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[ab8c6a6] | 76 | } |
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| 77 | |
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[fd54fef] | 78 | forall(T &) |
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[ab8c6a6] | 79 | static void default_thread_cancel_handler(ThreadCancelled(T) & ) { |
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[ecfd758] | 80 | // Improve this error message, can I do formatting? |
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[ab8c6a6] | 81 | abort( "Unhandled thread cancellation.\n" ); |
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| 82 | } |
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| 83 | |
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[8edbe40] | 84 | forall(T & | is_thread(T) | IS_EXCEPTION(ThreadCancelled, (T)) |
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[5456537] | 85 | | { EHM_DEFAULT_VTABLE(ThreadCancelled, (T)); }) |
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[ab8c6a6] | 86 | void ?{}( thread_dtor_guard_t & this, |
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[8edbe40] | 87 | T & thrd, void(*cancelHandler)(ThreadCancelled(T) &)) { |
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[ecfd758] | 88 | $monitor * m = get_monitor(thrd); |
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[3ea8ad1] | 89 | $thread * desc = get_thread(thrd); |
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| 90 | |
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| 91 | // Setup the monitor guard |
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[ab8c6a6] | 92 | void (*dtor)(T& mutex this) = ^?{}; |
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[8edbe40] | 93 | bool join = cancelHandler != (void(*)(ThreadCancelled(T)&))0; |
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[ab8c6a6] | 94 | (this.mg){&m, (void(*)())dtor, join}; |
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[342be43] | 95 | |
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[3ea8ad1] | 96 | |
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| 97 | /* 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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| 98 | |
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[342be43] | 99 | // After the guard set-up and any wait, check for cancellation. |
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| 100 | struct _Unwind_Exception * cancellation = desc->self_cor.cancellation; |
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| 101 | if ( likely( 0p == cancellation ) ) { |
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| 102 | return; |
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| 103 | } else if ( Cancelled == desc->state ) { |
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| 104 | return; |
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| 105 | } |
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| 106 | desc->state = Cancelled; |
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[8edbe40] | 107 | void(*defaultResumptionHandler)(ThreadCancelled(T) &) = |
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[fcd0b9d7] | 108 | join ? cancelHandler : default_thread_cancel_handler; |
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[342be43] | 109 | |
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| 110 | // TODO: Remove explitate vtable set once trac#186 is fixed. |
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[8edbe40] | 111 | ThreadCancelled(T) except; |
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| 112 | except.virtual_table = &_default_vtable; |
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[342be43] | 113 | except.the_thread = &thrd; |
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| 114 | except.the_exception = __cfaehm_cancellation_exception( cancellation ); |
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[ecfd758] | 115 | // Why is this cast required? |
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[8edbe40] | 116 | throwResume (ThreadCancelled(T) &)except; |
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[342be43] | 117 | |
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| 118 | except.the_exception->virtual_table->free( except.the_exception ); |
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| 119 | free( cancellation ); |
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| 120 | desc->self_cor.cancellation = 0p; |
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[ab8c6a6] | 121 | } |
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| 122 | |
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| 123 | void ^?{}( thread_dtor_guard_t & this ) { |
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| 124 | ^(this.mg){}; |
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| 125 | } |
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| 126 | |
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[8118303] | 127 | //----------------------------------------------------------------------------- |
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| 128 | // Starting and stopping threads |
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[fd54fef] | 129 | forall( T & | is_thread(T) ) |
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[09f357ec] | 130 | void __thrd_start( T & this, void (*main_p)(T &) ) { |
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[ac2b598] | 131 | $thread * this_thrd = get_thread(this); |
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[8118303] | 132 | |
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[1c273d0] | 133 | disable_interrupts(); |
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[c7a900a] | 134 | __cfactx_start(main_p, get_coroutine(this), this, __cfactx_invoke_thread); |
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[09f357ec] | 135 | |
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[e8e457e] | 136 | this_thrd->context.[SP, FP] = this_thrd->self_cor.context.[SP, FP]; |
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[ac5816d] | 137 | /* paranoid */ verify( this_thrd->context.SP ); |
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[8118303] | 138 | |
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[254ad1b] | 139 | schedule_thread$( this_thrd ); |
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[a3821fa] | 140 | enable_interrupts(); |
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[8118303] | 141 | } |
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| 142 | |
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[8c50aed] | 143 | //----------------------------------------------------------------------------- |
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| 144 | // Support for threads that don't ues the thread keyword |
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[fd54fef] | 145 | forall( T & | sized(T) | is_thread(T) | { void ?{}(T&); } ) |
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[65deb18] | 146 | void ?{}( scoped(T)& this ) with( this ) { |
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| 147 | handle{}; |
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[09f357ec] | 148 | __thrd_start(handle, main); |
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[bd98b58] | 149 | } |
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| 150 | |
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[fd54fef] | 151 | forall( T &, P... | sized(T) | is_thread(T) | { void ?{}(T&, P); } ) |
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[65deb18] | 152 | void ?{}( scoped(T)& this, P params ) with( this ) { |
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| 153 | handle{ params }; |
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[09f357ec] | 154 | __thrd_start(handle, main); |
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[8118303] | 155 | } |
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| 156 | |
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[fd54fef] | 157 | forall( T & | sized(T) | is_thread(T) ) |
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[65deb18] | 158 | void ^?{}( scoped(T)& this ) with( this ) { |
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| 159 | ^handle{}; |
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[44264c5] | 160 | } |
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| 161 | |
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[ab8c6a6] | 162 | //----------------------------------------------------------------------------- |
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[8edbe40] | 163 | forall(T & | is_thread(T) | IS_RESUMPTION_EXCEPTION(ThreadCancelled, (T)) |
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[5456537] | 164 | | { EHM_DEFAULT_VTABLE(ThreadCancelled, (T)); }) |
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[ab8c6a6] | 165 | T & join( T & this ) { |
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| 166 | thread_dtor_guard_t guard = { this, defaultResumptionHandler }; |
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| 167 | return this; |
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| 168 | } |
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| 169 | |
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[fe9468e2] | 170 | uint64_t thread_rand() { |
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| 171 | disable_interrupts(); |
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| 172 | uint64_t ret = __tls_rand(); |
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[a3821fa] | 173 | enable_interrupts(); |
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[fe9468e2] | 174 | return ret; |
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| 175 | } |
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| 176 | |
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[78b3f52] | 177 | // Local Variables: // |
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| 178 | // mode: c // |
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| 179 | // tab-width: 4 // |
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[6a3d2e7] | 180 | // End: // |
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