/*
 * This source file is part of the Swift.org open source project
 *
 * Copyright (c) 2015 Apple Inc. and the Swift project authors
 *
 * Licensed under Apache License v2.0 with Runtime Library Exception
 *
 * See http://swift.org/LICENSE.txt for license information
 * See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 *
 */

// forward declarations for functions we are stubbing out
// in the intial linux port.

#ifndef __DISPATCH__STUBS__INTERNAL
#define __DISPATCH__STUBS__INTERNAL

#ifndef TAILQ_FOREACH_SAFE
#define TAILQ_FOREACH_SAFE(var, head, field, temp)                             \
	for ((var) = TAILQ_FIRST((head));                                      \
		(var) && ((temp) = TAILQ_NEXT((var), field), 1); (var) = (temp))
#endif

#if DISPATCH_DEBUG
#ifndef TRASHIT
#define TRASHIT(x) do { (x) = (void *)-1; } while (0)
#endif
#endif

/*
 * Stub out defines for some mach types and related macros
 */

typedef uint32_t mach_port_t;

#define  MACH_PORT_NULL (0)
#define  MACH_PORT_DEAD (-1)

typedef uint32_t mach_error_t;

typedef uint32_t mach_vm_size_t;

typedef uint32_t mach_msg_return_t;

typedef uint32_t mach_msg_bits_t;

typedef uintptr_t mach_vm_address_t;

typedef uint32_t dispatch_mach_msg_t;

typedef uint32_t dispatch_mach_t;

typedef uint32_t dispatch_mach_reason_t;

typedef uint32_t voucher_activity_mode_t;

typedef uint32_t voucher_activity_trace_id_t;

typedef uint32_t voucher_activity_id_t;

typedef uint32_t voucher_activity_flag_t;

typedef struct { } mach_msg_header_t;


typedef void (*dispatch_mach_handler_function_t)(void*, dispatch_mach_reason_t,
						 dispatch_mach_msg_t, mach_error_t);

typedef void (*dispatch_mach_msg_destructor_t)(void*);

// Print a warning when an unported code path executes.
#define LINUX_PORT_ERROR()  do { printf("LINUX_PORT_ERROR_CALLED %s:%d: %s\n",__FILE__,__LINE__,__FUNCTION__); } while (0)

/*
 * Stub out defines for other missing types
 */

#if __linux__
// we fall back to use kevent
#define kevent64_s kevent
#define kevent64(kq,cl,nc,el,ne,f,to)  kevent(kq,cl,nc,el,ne,to)
#endif

// SIZE_T_MAX should not be hardcoded like this here.
#ifndef SIZE_T_MAX
#define SIZE_T_MAX (~(size_t)0)
#endif

// Define to 0 the NOTE_ values that are not present on Linux.
// Revisit this...would it be better to ifdef out the uses instead??

// The following values are passed as part of the EVFILT_TIMER requests

#define IGNORE_KEVENT64_EXT   /* will force the kevent64_s.ext[] to not be used -> leeway ignored */

#ifndef NOTE_SECONDS
#define NOTE_SECONDS	0x01
#define NOTE_USECONDS	0x02
#define NOTE_NSECONDS	0x04
#define NOTE_ABSOLUTE	0x08
#define KEVENT_NSEC_NOT_SUPPORTED
#endif
#define NOTE_CRITICAL	0x10
#define NOTE_BACKGROUND	0x20
#define NOTE_LEEWAY	0x40

// need to catch the following usage if it happens ..
// we simply return '0' as a value probably not correct

#define NOTE_VM_PRESSURE ({LINUX_PORT_ERROR(); 0;})

#endif