diff options
Diffstat (limited to 'drivers/misc/vmw_vmci/vmci_handle_array.h')
| -rw-r--r-- | drivers/misc/vmw_vmci/vmci_handle_array.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/misc/vmw_vmci/vmci_handle_array.h b/drivers/misc/vmw_vmci/vmci_handle_array.h new file mode 100644 index 000000000..0fc585978 --- /dev/null +++ b/drivers/misc/vmw_vmci/vmci_handle_array.h @@ -0,0 +1,61 @@ +/* + * VMware VMCI Driver + * + * Copyright (C) 2012 VMware, Inc. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation version 2 and no later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#ifndef _VMCI_HANDLE_ARRAY_H_ +#define _VMCI_HANDLE_ARRAY_H_ + +#include <linux/vmw_vmci_defs.h> +#include <linux/limits.h> +#include <linux/types.h> + +struct vmci_handle_arr { + u32 capacity; + u32 max_capacity; + u32 size; + u32 pad; + struct vmci_handle entries[]; +}; + +#define VMCI_HANDLE_ARRAY_HEADER_SIZE \ + offsetof(struct vmci_handle_arr, entries) +/* Select a default capacity that results in a 64 byte sized array */ +#define VMCI_HANDLE_ARRAY_DEFAULT_CAPACITY 6 +/* Make sure that the max array size can be expressed by a u32 */ +#define VMCI_HANDLE_ARRAY_MAX_CAPACITY \ + ((U32_MAX - VMCI_HANDLE_ARRAY_HEADER_SIZE - 1) / \ + sizeof(struct vmci_handle)) + +struct vmci_handle_arr *vmci_handle_arr_create(u32 capacity, u32 max_capacity); +void vmci_handle_arr_destroy(struct vmci_handle_arr *array); +int vmci_handle_arr_append_entry(struct vmci_handle_arr **array_ptr, + struct vmci_handle handle); +struct vmci_handle vmci_handle_arr_remove_entry(struct vmci_handle_arr *array, + struct vmci_handle + entry_handle); +struct vmci_handle vmci_handle_arr_remove_tail(struct vmci_handle_arr *array); +struct vmci_handle +vmci_handle_arr_get_entry(const struct vmci_handle_arr *array, u32 index); +bool vmci_handle_arr_has_entry(const struct vmci_handle_arr *array, + struct vmci_handle entry_handle); +struct vmci_handle *vmci_handle_arr_get_handles(struct vmci_handle_arr *array); + +static inline u32 vmci_handle_arr_get_size( + const struct vmci_handle_arr *array) +{ + return array->size; +} + + +#endif /* _VMCI_HANDLE_ARRAY_H_ */ |