bank_internal.h   [plain text]

/*
 * Copyright (c) 2012-2013 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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 */

#ifndef _BANK_BANK_INTERNAL_H_
#define _BANK_BANK_INTERNAL_H_

#include <stdint.h>
#include <mach/mach_types.h>

#ifdef	MACH_KERNEL_PRIVATE

#include <kern/thread.h>
#include <kern/locks.h>
#include <kern/queue.h>
#include <ipc/ipc_voucher.h>
#include <bank/bank_types.h>

/* Default value for Voucher Attribute Manager for BANK */
#define BANK_DEFAULT_VALUE NULL
typedef mach_voucher_attr_value_handle_t bank_handle_t;

#define BANK_TASK        0
#define BANK_ACCOUNT     1

struct bank_element {
	int           be_type;                   /* Type of element */
	int           be_refs;                   /* Ref count */
	int           be_made;                   /* Made refs for voucher, Actual ref is also taken for each Made ref */
	int32_t       be_pid;                    /* Customer task's pid. */
#if DEVELOPMENT || DEBUG
	task_t        be_task;                   /* Customer task, do not use it since ref is not taken on task */
#endif
};

typedef struct bank_element * bank_element_t;
#define BANK_ELEMENT_NULL ((bank_element_t) 0)

struct bank_task {
	struct bank_element bt_elem;                 /* Bank element */
	ledger_t            bt_creditcard;           /* Ledger of the customer task */
	queue_head_t        bt_accounts_to_pay;      /* List of accounts worked for me and need to pay */
	queue_head_t        bt_accounts_to_charge;   /* List of accounts I did work and need to charge */
	decl_lck_mtx_data(, bt_acc_to_pay_lock)      /* Lock to protect accounts to pay list */
	decl_lck_mtx_data(, bt_acc_to_charge_lock)   /* Lock to protect accounts to charge list */
#if DEVELOPMENT || DEBUG
	queue_chain_t       bt_global_elt;           /* Element on the global bank task chain */
#endif
};

#define bt_type             bt_elem.be_type
#define bt_refs             bt_elem.be_refs
#define bt_made             bt_elem.be_made
#define bt_pid              bt_elem.be_pid

#if DEVELOPMENT || DEBUG
#define bt_task             bt_elem.be_task
#endif

typedef struct bank_task * bank_task_t;
#define BANK_TASK_NULL  ((bank_task_t) 0)

#define bank_task_reference(elem) 	\
		(OSAddAtomic(1, &(elem)->bt_refs))

#define bank_task_release(elem) 	\
		(OSAddAtomic(-1, &(elem)->bt_refs))

#define bank_task_release_num(elem, num) 	\
		(OSAddAtomic(-(num), &(elem)->bt_refs))

#define bank_task_made_reference(elem) 	\
		(OSAddAtomic(1, &(elem)->bt_made))

#define bank_task_made_release(elem) 	\
		(OSAddAtomic(-1, &(elem)->bt_made))

#define bank_task_made_release_num(elem, num) 	\
		(OSAddAtomic(-(num), &(elem)->bt_made))


struct bank_account {
	struct bank_element ba_elem;                 /* Bank element */
	ledger_t            ba_bill;                 /* Temporary ledger i.e. chit */
	bank_task_t         ba_merchant;             /* Task who worked for me, who will charge me on behalf of */
	bank_task_t         ba_holder;               /* Credit Card task holder */
	queue_chain_t       ba_next_acc_to_pay;      /* Next account I need to pay to */
	queue_chain_t       ba_next_acc_to_charge;   /* Next account I need to charge to */
#if DEVELOPMENT || DEBUG
	queue_chain_t       ba_global_elt;           /* Element on the global account chain */
#endif
};

#define ba_type             ba_elem.be_type
#define ba_refs             ba_elem.be_refs
#define ba_made             ba_elem.be_made
#define ba_pid              ba_elem.be_pid

#if DEVELOPMENT || DEBUG
#define ba_task             ba_elem.be_task
#endif

typedef struct bank_account * bank_account_t;
#define BANK_ACCOUNT_NULL  ((bank_account_t) 0)

#define bank_account_reference(elem) 	\
		(OSAddAtomic(1, &(elem)->ba_refs))

#define bank_account_release(elem) 	\
		(OSAddAtomic(-1, &(elem)->ba_refs))

#define bank_account_release_num(elem, num) 	\
		(OSAddAtomic(-(num), &(elem)->ba_refs))

#define bank_account_made_reference(elem) 	\
		(OSAddAtomic(1, &(elem)->ba_made))

#define bank_account_made_release(elem) 	\
		(OSAddAtomic(-1, &(elem)->ba_made))

#define bank_account_made_release_num(elem, num) 	\
		(OSAddAtomic(-(num), &(elem)->ba_made))

struct _bank_ledger_indices {
	int cpu_time;
};

extern struct _bank_ledger_indices bank_ledgers;

extern void bank_init(void);
extern void bank_task_destroy(bank_task_t);
extern uint64_t bank_billed_time(bank_task_t bank_task);
extern uint64_t bank_serviced_time(bank_task_t bank_task);
extern ledger_t bank_get_voucher_ledger(ipc_voucher_t voucher);
extern void bank_swap_thread_bank_ledger(thread_t thread, ledger_t ledger);

#endif /* MACH_KERNEL_PRIVATE */
#endif /* _BANK_BANK_INTERNAL_H_ */