| 1 | //
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2021 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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| 7 | // bits/weakso_locks.hfa -- PUBLIC
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| 8 | // Runtime locks that are compiled out when used without linking the runtime
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| 9 | // thread system.
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| 10 | //
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| 11 | // Author : Thierry Delisle
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| 12 | // Created On : Thu Jan 21 19:46:50 2021
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| 13 | // Last Modified By :
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| 14 | // Last Modified On :
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| 15 | // Update Count :
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| 16 | //
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| 17 |
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| 18 | #pragma once
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| 19 |
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| 20 | #include "bits/locks.hfa"
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| 21 | #include "bits/sequence.hfa"
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| 22 | #include "bits/containers.hfa"
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| 23 | #include "containers/list.hfa"
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| 24 |
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| 25 | struct thread$;
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| 26 |
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| 27 | //-----------------------------------------------------------------------------
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| 28 | // Blocking Locks
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| 29 | struct blocking_lock {
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| 30 | // Spin lock used for mutual exclusion
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| 31 | __spinlock_t lock;
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| 32 |
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| 33 | // List of blocked threads
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| 34 | dlist( thread$ ) blocked_threads;
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| 35 |
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| 36 | // Count of current blocked threads
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| 37 | size_t wait_count;
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| 38 |
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| 39 | // Flag if the lock allows multiple acquisition
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| 40 | bool multi_acquisition;
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| 41 |
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| 42 | // Flag if lock can be released by non owner
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| 43 | bool strict_owner;
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| 44 |
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| 45 | // Current thread owning the lock
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| 46 | struct thread$ * owner;
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| 47 |
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| 48 | // Number of recursion level
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| 49 | size_t recursion_count;
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| 50 | };
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| 51 |
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| 52 | void ?{}( blocking_lock & this, bool multi_acquisition, bool strict_owner ) OPTIONAL_THREAD;
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| 53 | void ^?{}( blocking_lock & this ) OPTIONAL_THREAD;
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| 54 |
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| 55 | void lock( blocking_lock & this ) OPTIONAL_THREAD;
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| 56 | bool try_lock( blocking_lock & this ) OPTIONAL_THREAD;
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| 57 | void unlock( blocking_lock & this ) OPTIONAL_THREAD;
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| 58 | void on_notify( blocking_lock & this, struct thread$ * t ) OPTIONAL_THREAD;
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| 59 | size_t on_wait( blocking_lock & this ) OPTIONAL_THREAD;
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| 60 | void on_wakeup( blocking_lock & this, size_t ) OPTIONAL_THREAD;
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| 61 | size_t wait_count( blocking_lock & this ) OPTIONAL_THREAD;
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| 62 |
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| 63 | //----------
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| 64 | struct multiple_acquisition_lock {
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| 65 | inline blocking_lock;
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| 66 | };
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| 67 |
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| 68 |
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| 69 | static inline void ?{}( multiple_acquisition_lock & this ) {((blocking_lock &)this){ true, false };}
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| 70 | static inline void ^?{}( multiple_acquisition_lock & this ) {}
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| 71 | static inline void lock ( multiple_acquisition_lock & this ) { lock ( (blocking_lock &)this ); }
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| 72 | static inline bool try_lock ( multiple_acquisition_lock & this ) { return try_lock( (blocking_lock &)this ); }
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| 73 | static inline void unlock ( multiple_acquisition_lock & this ) { unlock ( (blocking_lock &)this ); }
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| 74 | static inline size_t on_wait ( multiple_acquisition_lock & this ) { return on_wait ( (blocking_lock &)this ); }
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| 75 | static inline void on_wakeup( multiple_acquisition_lock & this, size_t v ) { on_wakeup ( (blocking_lock &)this, v ); }
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| 76 | static inline void on_notify( multiple_acquisition_lock & this, struct thread$ * t ){ on_notify( (blocking_lock &)this, t ); }
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