20 lines
729 B
C
20 lines
729 B
C
#pragma once
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typedef volatile struct {
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volatile int latch[1];
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int owner;
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const char * func;
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} spin_lock_t;
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#define spin_init(lock) do { (lock).owner = 0; (lock).latch[0] = 0; (lock).func = NULL; } while (0)
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#define DEBUG_LOCKS
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#ifdef DEBUG_LOCKS
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#define spin_lock(lock) do { while (__sync_lock_test_and_set((lock).latch, 0x01)); (lock).owner = this_core->cpu_id+1; (lock).func = __func__; } while (0)
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#define spin_unlock(lock) do { (lock).func = NULL; (lock).owner = -1; __sync_lock_release((lock).latch); } while (0)
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#else
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#define spin_lock(lock) do { while (__sync_lock_test_and_set((lock).latch, 0x01)); } while(0)
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#define spin_unlock(lock) __sync_lock_release((lock).latch);
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#endif
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#include <kernel/process.h>
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