72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
#include <uacpi/internal/shareable.h>
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#include <uacpi/internal/stdlib.h>
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#include <uacpi/platform/atomic.h>
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#ifndef UACPI_BAREBONES_MODE
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#define BUGGED_REFCOUNT 0xFFFFFFFF
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void uacpi_shareable_init(uacpi_handle handle)
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{
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struct uacpi_shareable *shareable = handle;
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shareable->reference_count = 1;
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}
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uacpi_bool uacpi_bugged_shareable(uacpi_handle handle)
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{
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struct uacpi_shareable *shareable = handle;
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if (uacpi_unlikely(shareable->reference_count == 0))
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uacpi_make_shareable_bugged(shareable);
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return uacpi_atomic_load32(&shareable->reference_count) == BUGGED_REFCOUNT;
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}
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void uacpi_make_shareable_bugged(uacpi_handle handle)
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{
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struct uacpi_shareable *shareable = handle;
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uacpi_atomic_store32(&shareable->reference_count, BUGGED_REFCOUNT);
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}
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uacpi_u32 uacpi_shareable_ref(uacpi_handle handle)
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{
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struct uacpi_shareable *shareable = handle;
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if (uacpi_unlikely(uacpi_bugged_shareable(shareable)))
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return BUGGED_REFCOUNT;
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return uacpi_atomic_inc32(&shareable->reference_count) - 1;
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}
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uacpi_u32 uacpi_shareable_unref(uacpi_handle handle)
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{
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struct uacpi_shareable *shareable = handle;
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if (uacpi_unlikely(uacpi_bugged_shareable(shareable)))
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return BUGGED_REFCOUNT;
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return uacpi_atomic_dec32(&shareable->reference_count) + 1;
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}
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void uacpi_shareable_unref_and_delete_if_last(
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uacpi_handle handle, void (*do_free)(uacpi_handle)
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)
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{
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if (handle == UACPI_NULL)
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return;
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if (uacpi_unlikely(uacpi_bugged_shareable(handle)))
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return;
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if (uacpi_shareable_unref(handle) == 1)
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do_free(handle);
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}
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uacpi_u32 uacpi_shareable_refcount(uacpi_handle handle)
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{
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struct uacpi_shareable *shareable = handle;
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return uacpi_atomic_load32(&shareable->reference_count);
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}
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#endif // !UACPI_BAREBONES_MODE
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