[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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[0ebbca4] | 12 | // Last Modified On : Sat Feb 12 15:24:18 2022 |
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| 13 | // Update Count : 66 |
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[78b3f52] | 14 | // |
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| 15 | |
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[2026bb6] | 16 | #define __cforall_thread__ |
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[43784ac] | 17 | #define _GNU_SOURCE |
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[2026bb6] | 18 | |
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[58b6d1b] | 19 | #include "thread.hfa" |
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[78b3f52] | 20 | |
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[73abe95] | 21 | #include "kernel_private.hfa" |
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[ab8c6a6] | 22 | #include "exception.hfa" |
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[8118303] | 23 | |
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| 24 | #define __CFA_INVOKE_PRIVATE__ |
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| 25 | #include "invoke.h" |
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| 26 | |
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[c655650] | 27 | extern uint32_t __global_random_seed, __global_random_prime, __global_random_mask; |
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[2210cfc] | 28 | |
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[8118303] | 29 | //----------------------------------------------------------------------------- |
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| 30 | // Thread ctors and dtors |
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[2210cfc] | 31 | void ?{}( thread$ & this, const char * const name, cluster & cl, void * storage, size_t storageSize ) with( this ) { |
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[121be3e] | 32 | context{ 0p, 0p }; |
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[de6319f] | 33 | self_cor{ name, storage, storageSize }; |
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[6a77224] | 34 | ticket = TICKET_RUNNING; |
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[e8e457e] | 35 | state = Start; |
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[3381ed7] | 36 | preempted = __NO_PREEMPTION; |
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[ab5baab] | 37 | corctx_flag = false; |
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[82c948c] | 38 | curr_cor = &self_cor; |
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[65deb18] | 39 | self_mon.owner = &this; |
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| 40 | self_mon.recursion = 1; |
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| 41 | self_mon_p = &self_mon; |
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[de6319f] | 42 | curr_cluster = &cl; |
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[b798713] | 43 | link.next = 0p; |
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[ef94ae7] | 44 | link.ts = -1llu; |
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[24e321c] | 45 | preferred = ready_queue_new_preferred(); |
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[89eff25] | 46 | last_proc = 0p; |
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[c655650] | 47 | random_state = __global_random_mask ? __global_random_prime : __global_random_prime ^ rdtscl(); |
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[b4b63e8] | 48 | #if defined( __CFA_WITH_VERIFY__ ) |
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[ac12f1f] | 49 | canary = 0x0D15EA5E0D15EA5Ep; |
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[b4b63e8] | 50 | #endif |
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[de94a60] | 51 | |
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[c131a02] | 52 | seqable.next = 0p; |
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| 53 | seqable.back = 0p; |
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| 54 | |
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[121be3e] | 55 | node.next = 0p; |
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| 56 | node.prev = 0p; |
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[a1a17a74] | 57 | doregister(curr_cluster, this); |
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[5ea06d6] | 58 | |
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[65deb18] | 59 | monitors{ &self_mon_p, 1, (fptr_t)0 }; |
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[8118303] | 60 | } |
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| 61 | |
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[e84ab3d] | 62 | void ^?{}(thread$& this) with( this ) { |
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[b4b63e8] | 63 | #if defined( __CFA_WITH_VERIFY__ ) |
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[ac12f1f] | 64 | canary = 0xDEADDEADDEADDEADp; |
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[b4b63e8] | 65 | #endif |
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[a1a17a74] | 66 | unregister(curr_cluster, this); |
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[65deb18] | 67 | ^self_cor{}; |
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[8118303] | 68 | } |
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| 69 | |
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[fd54fef] | 70 | forall(T &) |
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[ab8c6a6] | 71 | void copy(ThreadCancelled(T) * dst, ThreadCancelled(T) * src) { |
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| 72 | dst->virtual_table = src->virtual_table; |
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| 73 | dst->the_thread = src->the_thread; |
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| 74 | dst->the_exception = src->the_exception; |
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| 75 | } |
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| 76 | |
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[fd54fef] | 77 | forall(T &) |
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[ab8c6a6] | 78 | const char * msg(ThreadCancelled(T) *) { |
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[ecfd758] | 79 | return "ThreadCancelled(...)"; |
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[ab8c6a6] | 80 | } |
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| 81 | |
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[fd54fef] | 82 | forall(T &) |
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[ab8c6a6] | 83 | static void default_thread_cancel_handler(ThreadCancelled(T) & ) { |
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[ecfd758] | 84 | // Improve this error message, can I do formatting? |
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[ab8c6a6] | 85 | abort( "Unhandled thread cancellation.\n" ); |
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| 86 | } |
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| 87 | |
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[8edbe40] | 88 | forall(T & | is_thread(T) | IS_EXCEPTION(ThreadCancelled, (T)) |
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[5456537] | 89 | | { EHM_DEFAULT_VTABLE(ThreadCancelled, (T)); }) |
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[ab8c6a6] | 90 | void ?{}( thread_dtor_guard_t & this, |
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[8edbe40] | 91 | T & thrd, void(*cancelHandler)(ThreadCancelled(T) &)) { |
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[e84ab3d] | 92 | monitor$ * m = get_monitor(thrd); |
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| 93 | thread$ * desc = get_thread(thrd); |
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[3ea8ad1] | 94 | |
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| 95 | // Setup the monitor guard |
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[ab8c6a6] | 96 | void (*dtor)(T& mutex this) = ^?{}; |
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[8edbe40] | 97 | bool join = cancelHandler != (void(*)(ThreadCancelled(T)&))0; |
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[ab8c6a6] | 98 | (this.mg){&m, (void(*)())dtor, join}; |
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[342be43] | 99 | |
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[3ea8ad1] | 100 | |
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| 101 | /* 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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| 102 | |
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[342be43] | 103 | // After the guard set-up and any wait, check for cancellation. |
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| 104 | struct _Unwind_Exception * cancellation = desc->self_cor.cancellation; |
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| 105 | if ( likely( 0p == cancellation ) ) { |
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| 106 | return; |
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| 107 | } else if ( Cancelled == desc->state ) { |
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| 108 | return; |
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| 109 | } |
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| 110 | desc->state = Cancelled; |
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[8edbe40] | 111 | void(*defaultResumptionHandler)(ThreadCancelled(T) &) = |
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[fcd0b9d7] | 112 | join ? cancelHandler : default_thread_cancel_handler; |
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[342be43] | 113 | |
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| 114 | // TODO: Remove explitate vtable set once trac#186 is fixed. |
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[8edbe40] | 115 | ThreadCancelled(T) except; |
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| 116 | except.virtual_table = &_default_vtable; |
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[342be43] | 117 | except.the_thread = &thrd; |
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| 118 | except.the_exception = __cfaehm_cancellation_exception( cancellation ); |
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[ecfd758] | 119 | // Why is this cast required? |
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[8edbe40] | 120 | throwResume (ThreadCancelled(T) &)except; |
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[342be43] | 121 | |
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| 122 | except.the_exception->virtual_table->free( except.the_exception ); |
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| 123 | free( cancellation ); |
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| 124 | desc->self_cor.cancellation = 0p; |
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[ab8c6a6] | 125 | } |
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| 126 | |
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| 127 | void ^?{}( thread_dtor_guard_t & this ) { |
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| 128 | ^(this.mg){}; |
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| 129 | } |
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| 130 | |
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[8118303] | 131 | //----------------------------------------------------------------------------- |
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| 132 | // Starting and stopping threads |
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[fd54fef] | 133 | forall( T & | is_thread(T) ) |
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[09f357ec] | 134 | void __thrd_start( T & this, void (*main_p)(T &) ) { |
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[e84ab3d] | 135 | thread$ * this_thrd = get_thread(this); |
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[8118303] | 136 | |
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[1c273d0] | 137 | disable_interrupts(); |
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[c7a900a] | 138 | __cfactx_start(main_p, get_coroutine(this), this, __cfactx_invoke_thread); |
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[09f357ec] | 139 | |
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[e8e457e] | 140 | this_thrd->context.[SP, FP] = this_thrd->self_cor.context.[SP, FP]; |
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[ac5816d] | 141 | /* paranoid */ verify( this_thrd->context.SP ); |
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[8118303] | 142 | |
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[24e321c] | 143 | schedule_thread$( this_thrd, UNPARK_LOCAL ); |
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[a3821fa] | 144 | enable_interrupts(); |
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[8118303] | 145 | } |
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| 146 | |
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[8c50aed] | 147 | //----------------------------------------------------------------------------- |
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| 148 | // Support for threads that don't ues the thread keyword |
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[fd54fef] | 149 | forall( T & | sized(T) | is_thread(T) | { void ?{}(T&); } ) |
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[65deb18] | 150 | void ?{}( scoped(T)& this ) with( this ) { |
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| 151 | handle{}; |
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[09f357ec] | 152 | __thrd_start(handle, main); |
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[bd98b58] | 153 | } |
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| 154 | |
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[fd54fef] | 155 | forall( T &, P... | sized(T) | is_thread(T) | { void ?{}(T&, P); } ) |
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[65deb18] | 156 | void ?{}( scoped(T)& this, P params ) with( this ) { |
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| 157 | handle{ params }; |
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[09f357ec] | 158 | __thrd_start(handle, main); |
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[8118303] | 159 | } |
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| 160 | |
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[fd54fef] | 161 | forall( T & | sized(T) | is_thread(T) ) |
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[65deb18] | 162 | void ^?{}( scoped(T)& this ) with( this ) { |
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| 163 | ^handle{}; |
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[44264c5] | 164 | } |
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| 165 | |
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[ab8c6a6] | 166 | //----------------------------------------------------------------------------- |
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[8edbe40] | 167 | forall(T & | is_thread(T) | IS_RESUMPTION_EXCEPTION(ThreadCancelled, (T)) |
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[5456537] | 168 | | { EHM_DEFAULT_VTABLE(ThreadCancelled, (T)); }) |
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[ab8c6a6] | 169 | T & join( T & this ) { |
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| 170 | thread_dtor_guard_t guard = { this, defaultResumptionHandler }; |
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| 171 | return this; |
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| 172 | } |
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| 173 | |
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[5d1ebb9] | 174 | //----------------------------------------------------------------------------- |
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[2210cfc] | 175 | #define GENERATOR LCG |
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| 176 | |
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[00f5fde] | 177 | void set_seed( uint32_t seed ) { |
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[0ebbca4] | 178 | uint32_t & state = active_thread()->random_state; |
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| 179 | state = __global_random_seed = seed; |
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| 180 | GENERATOR( state ); |
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| 181 | __global_random_prime = state; |
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[c655650] | 182 | __global_random_mask = true; |
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[00f5fde] | 183 | } // set_seed |
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[12b5e94a] | 184 | |
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| 185 | uint32_t prng( void ) { // [0,UINT_MAX] |
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| 186 | uint32_t & state = active_thread()->random_state; |
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| 187 | return GENERATOR( state ); |
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| 188 | } // prng |
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[2210cfc] | 189 | |
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[78b3f52] | 190 | // Local Variables: // |
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| 191 | // mode: c // |
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| 192 | // tab-width: 4 // |
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[6a3d2e7] | 193 | // End: // |
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