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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/include/linux/kref.h | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/include/linux/kref.h')
-rw-r--r-- | ANDROID_3.4.5/include/linux/kref.h | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/ANDROID_3.4.5/include/linux/kref.h b/ANDROID_3.4.5/include/linux/kref.h deleted file mode 100644 index 9c07dceb..00000000 --- a/ANDROID_3.4.5/include/linux/kref.h +++ /dev/null @@ -1,96 +0,0 @@ -/* - * kref.h - library routines for handling generic reference counted objects - * - * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com> - * Copyright (C) 2004 IBM Corp. - * - * based on kobject.h which was: - * Copyright (C) 2002-2003 Patrick Mochel <mochel@osdl.org> - * Copyright (C) 2002-2003 Open Source Development Labs - * - * This file is released under the GPLv2. - * - */ - -#ifndef _KREF_H_ -#define _KREF_H_ - -#include <linux/bug.h> -#include <linux/atomic.h> -#include <linux/kernel.h> - -struct kref { - atomic_t refcount; -}; - -/** - * kref_init - initialize object. - * @kref: object in question. - */ -static inline void kref_init(struct kref *kref) -{ - atomic_set(&kref->refcount, 1); -} - -/** - * kref_get - increment refcount for object. - * @kref: object. - */ -static inline void kref_get(struct kref *kref) -{ - WARN_ON(!atomic_read(&kref->refcount)); - atomic_inc(&kref->refcount); -} - -/** - * kref_sub - subtract a number of refcounts for object. - * @kref: object. - * @count: Number of recounts to subtract. - * @release: pointer to the function that will clean up the object when the - * last reference to the object is released. - * This pointer is required, and it is not acceptable to pass kfree - * in as this function. If the caller does pass kfree to this - * function, you will be publicly mocked mercilessly by the kref - * maintainer, and anyone else who happens to notice it. You have - * been warned. - * - * Subtract @count from the refcount, and if 0, call release(). - * Return 1 if the object was removed, otherwise return 0. Beware, if this - * function returns 0, you still can not count on the kref from remaining in - * memory. Only use the return value if you want to see if the kref is now - * gone, not present. - */ -static inline int kref_sub(struct kref *kref, unsigned int count, - void (*release)(struct kref *kref)) -{ - WARN_ON(release == NULL); - - if (atomic_sub_and_test((int) count, &kref->refcount)) { - release(kref); - return 1; - } - return 0; -} - -/** - * kref_put - decrement refcount for object. - * @kref: object. - * @release: pointer to the function that will clean up the object when the - * last reference to the object is released. - * This pointer is required, and it is not acceptable to pass kfree - * in as this function. If the caller does pass kfree to this - * function, you will be publicly mocked mercilessly by the kref - * maintainer, and anyone else who happens to notice it. You have - * been warned. - * - * Decrement the refcount, and if 0, call release(). - * Return 1 if the object was removed, otherwise return 0. Beware, if this - * function returns 0, you still can not count on the kref from remaining in - * memory. Only use the return value if you want to see if the kref is now - * gone, not present. - */ -static inline int kref_put(struct kref *kref, void (*release)(struct kref *kref)) -{ - return kref_sub(kref, 1, release); -} -#endif /* _KREF_H_ */ |