src/Unix/sysdeps.h

/*
 *  sysdeps.h - System dependent definitions for Linux
 *
 *  SheepShaver (C) 1997-2008 Christian Bauer and Marc Hellwig
 *
 *  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; either version 2 of the License, or
 *  (at your option) any 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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef SYSDEPS_H
#define SYSDEPS_H

#ifndef __STDC__
#error "Your compiler is not ANSI. Get a real one."
#endif

#include "config.h"
#include "user_strings_unix.h"

#ifndef STDC_HEADERS
#error "You don't have ANSI C header files."
#endif

#ifdef HAVE_UNISTD_H
# include <sys/types.h>
# include <unistd.h>
#endif

#include <netinet/in.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <signal.h>

#ifdef HAVE_PTHREADS
# include <pthread.h>
#endif

#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif

#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# ifdef HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif

#ifdef __MACH__
#include <mach/mach_types.h>
#endif

// Fix offsetof() on FreeBSD and GCC >= 3.4
#if defined(__FreeBSD__) && defined(__cplusplus)
#undef offsetof
/* The cast to "char &" below avoids problems with user-defined
   "operator &", which can appear in a POD type.  */
#define offsetof(TYPE, MEMBER)                          \
  (__offsetof__ (reinterpret_cast <size_t>              \
                 (&reinterpret_cast <char &>            \
                  (static_cast<TYPE *> (0)->MEMBER))))
#endif

// Define for external components
#define SHEEPSHAVER 1

// Always use Real Addressing mode on native architectures
// Otherwise, use Direct Addressing mode if NATMEM_OFFSET is set
#if !defined(EMULATED_PPC)
#define REAL_ADDRESSING 1
#include "ppc_asm.tmpl"
#elif defined(NATMEM_OFFSET)
#define DIRECT_ADDRESSING 1
#else
#define REAL_ADDRESSING 1
#endif

// Always use the complete non-stubs Ethernet driver
#define USE_ETHER_FULL_DRIVER 1

#define POWERPC_ROM 1

#if EMULATED_PPC
// Mac ROM is write protected when banked memory is used
#if REAL_ADDRESSING || DIRECT_ADDRESSING
# define ROM_IS_WRITE_PROTECTED 0
# define USE_SCRATCHMEM_SUBTERFUGE 1
#else
# define ROM_IS_WRITE_PROTECTED 1
#endif
// Configure PowerPC emulator
#define PPC_REENTRANT_JIT 1
#define PPC_CHECK_INTERRUPTS 1
#define PPC_DECODE_CACHE 1
#define PPC_FLIGHT_RECORDER 1
#define PPC_PROFILE_COMPILE_TIME 0
#define PPC_PROFILE_GENERIC_CALLS 0
#define PPC_PROFILE_REGS_USE 0
#define KPX_MAX_CPUS 1
#if ENABLE_DYNGEN
#define PPC_ENABLE_JIT 1
#endif
#if defined(__i386__) || defined(__x86_64__)
#define DYNGEN_ASM_OPTS 1
#endif
#else
// Mac ROM is write protected
#define ROM_IS_WRITE_PROTECTED 1
#define USE_SCRATCHMEM_SUBTERFUGE 0
#endif

// Data types
typedef unsigned char uint8;
typedef signed char int8;
#if SIZEOF_SHORT == 2
typedef unsigned short uint16;
typedef short int16;
#elif SIZEOF_INT == 2
typedef unsigned int uint16;
typedef int int16;
#else
#error "No 2 byte type, you lose."
#endif
#if SIZEOF_INT == 4
typedef unsigned int uint32;
typedef int int32;
#elif SIZEOF_LONG == 4
typedef unsigned long uint32;
typedef long int32;
#else
#error "No 4 byte type, you lose."
#endif
#if SIZEOF_LONG == 8
typedef unsigned long uint64;
typedef long int64;
#define VAL64(a) (a ## l)
#define UVAL64(a) (a ## ul)
#elif SIZEOF_LONG_LONG == 8
typedef unsigned long long uint64;
typedef long long int64;
#define VAL64(a) (a ## LL)
#define UVAL64(a) (a ## uLL)
#else
#error "No 8 byte type, you lose."
#endif
#if SIZEOF_VOID_P == 4
typedef uint32 uintptr;
typedef int32 intptr;
#elif SIZEOF_VOID_P == 8
typedef uint64 uintptr;
typedef int64 intptr;
#else
#error "Unsupported size of pointer"
#endif

// Define if the host processor supports fast unaligned load/stores
#if defined __i386__ || defined __x86_64__
#define UNALIGNED_PROFITABLE 1
#endif


/**
 *              Helper functions to byteswap data
 **/

#if defined(__GNUC__)
#if defined(__x86_64__) || defined(__i386__)
// Linux/AMD64 currently has no asm optimized bswap_32() in <byteswap.h>
#define opt_bswap_32 do_opt_bswap_32
static inline uint32 do_opt_bswap_32(uint32 x)
{
  uint32 v;
  __asm__ __volatile__ ("bswap %0" : "=r" (v) : "0" (x));
  return v;
}
#endif
#endif

#ifdef HAVE_BYTESWAP_H
#include <byteswap.h>
#endif

#ifdef  opt_bswap_16
#undef  bswap_16
#define bswap_16 opt_bswap_16
#endif
#ifndef bswap_16
#define bswap_16 generic_bswap_16
#endif

static inline uint16 generic_bswap_16(uint16 x)
{
  return ((x & 0xff) << 8) | ((x >> 8) & 0xff);
}

#ifdef  opt_bswap_32
#undef  bswap_32
#define bswap_32 opt_bswap_32
#endif
#ifndef bswap_32
#define bswap_32 generic_bswap_32
#endif

static inline uint32 generic_bswap_32(uint32 x)
{
  return (((x & 0xff000000) >> 24) |
                  ((x & 0x00ff0000) >>  8) |
                  ((x & 0x0000ff00) <<  8) |
                  ((x & 0x000000ff) << 24) );
}

#if defined(__i386__)
#define opt_bswap_64 do_opt_bswap_64
static inline uint64 do_opt_bswap_64(uint64 x)
{
  return (bswap_32(x >> 32) | (((uint64)bswap_32((uint32)x)) << 32));
}
#endif

#ifdef  opt_bswap_64
#undef  bswap_64
#define bswap_64 opt_bswap_64
#endif
#ifndef bswap_64
#define bswap_64 generic_bswap_64
#endif

static inline uint64 generic_bswap_64(uint64 x)
{
  return (((x & UVAL64(0xff00000000000000)) >> 56) |
                  ((x & UVAL64(0x00ff000000000000)) >> 40) |
                  ((x & UVAL64(0x0000ff0000000000)) >> 24) |
                  ((x & UVAL64(0x000000ff00000000)) >>  8) |
                  ((x & UVAL64(0x00000000ff000000)) <<  8) |
                  ((x & UVAL64(0x0000000000ff0000)) << 24) |
                  ((x & UVAL64(0x000000000000ff00)) << 40) |
                  ((x & UVAL64(0x00000000000000ff)) << 56) );
}

#ifdef WORDS_BIGENDIAN
static inline uint16 tswap16(uint16 x) { return x; }
static inline uint32 tswap32(uint32 x) { return x; }
static inline uint64 tswap64(uint64 x) { return x; }
#else
static inline uint16 tswap16(uint16 x) { return bswap_16(x); }
static inline uint32 tswap32(uint32 x) { return bswap_32(x); }
static inline uint64 tswap64(uint64 x) { return bswap_64(x); }
#endif

// spin locks
#ifdef __GNUC__

#if defined(__powerpc__) || defined(__ppc__)
#define HAVE_TEST_AND_SET 1
static inline int testandset(volatile int *p)
{
        int ret;
        __asm__ __volatile__("0:    lwarx       %0,0,%1\n"
                                                 "      xor.    %0,%3,%0\n"
                                                 "      bne             1f\n"
                                                 "      stwcx.  %2,0,%1\n"
                                                 "      bne-    0b\n"
                                                 "1:    "
                                                 : "=&r" (ret)
                                                 : "r" (p), "r" (1), "r" (0)
                                                 : "cr0", "memory");
        return ret;
}
#endif

#if defined(__i386__) || defined(__x86_64__)
#define HAVE_TEST_AND_SET 1
static inline int testandset(volatile int *p)
{
        long int ret;
        /* Note: the "xchg" instruction does not need a "lock" prefix */
        __asm__ __volatile__("xchgl %k0, %1"
                                                 : "=r" (ret), "=m" (*p)
                                                 : "0" (1), "m" (*p)
                                                 : "memory");
        return ret;
}
#endif

#ifdef __s390__
#define HAVE_TEST_AND_SET 1
static inline int testandset(volatile int *p)
{
        int ret;

        __asm__ __volatile__("0: cs    %0,%1,0(%2)\n"
                                                 "   jl    0b"
                                                 : "=&d" (ret)
                                                 : "r" (1), "a" (p), "0" (*p) 
                                                 : "cc", "memory" );
        return ret;
}
#endif

#ifdef __alpha__
#define HAVE_TEST_AND_SET 1
static inline int testandset(volatile int *p)
{
        int ret;
        unsigned long one;

        __asm__ __volatile__("0:        mov 1,%2\n"
                                                 "      ldl_l %0,%1\n"
                                                 "      stl_c %2,%1\n"
                                                 "      beq %2,1f\n"
                                                 ".subsection 2\n"
                                                 "1:    br 0b\n"
                                                 ".previous"
                                                 : "=r" (ret), "=m" (*p), "=r" (one)
                                                 : "m" (*p));
        return ret;
}
#endif

#ifdef __sparc__
#define HAVE_TEST_AND_SET 1
static inline int testandset(volatile int *p)
{
        int ret;

        __asm__ __volatile__("ldstub    [%1], %0"
                                                 : "=r" (ret)
                                                 : "r" (p)
                                                 : "memory");

        return (ret ? 1 : 0);
}
#endif

#ifdef __arm__
#define HAVE_TEST_AND_SET 1
static inline int testandset(volatile int *p)
{
        register unsigned int ret;
        __asm__ __volatile__("swp %0, %1, [%2]"
                                                 : "=r"(ret)
                                                 : "0"(1), "r"(p));
        
        return ret;
}
#endif

#endif /* __GNUC__ */

typedef volatile int spinlock_t;

static const spinlock_t SPIN_LOCK_UNLOCKED = 0;

#if defined(HAVE_TEST_AND_SET) && defined(HAVE_PTHREADS)
// There is nothing to lock if we are not in an multithreaded environment
#define HAVE_SPINLOCKS 1
static inline void spin_lock(spinlock_t *lock)
{
        while (testandset(lock));
}

static inline void spin_unlock(spinlock_t *lock)
{
        *lock = 0;
}

static inline int spin_trylock(spinlock_t *lock)
{
        return !testandset(lock);
}
#else
static inline void spin_lock(spinlock_t *lock)
{
}

static inline void spin_unlock(spinlock_t *lock)
{
}

static inline int spin_trylock(spinlock_t *lock)
{
        return 1;
}
#endif

// Time data type for Time Manager emulation
#ifdef HAVE_CLOCK_GETTIME
typedef struct timespec tm_time_t;
#elif defined(__MACH__)
typedef mach_timespec_t tm_time_t;
#else
typedef struct timeval tm_time_t;
#endif

/* Define codes for all the float formats that we know of.
 * Though we only handle IEEE format.  */
#define UNKNOWN_FLOAT_FORMAT 0
#define IEEE_FLOAT_FORMAT 1
#define VAX_FLOAT_FORMAT 2
#define IBM_FLOAT_FORMAT 3
#define C4X_FLOAT_FORMAT 4

// High-precision timing
#if defined(HAVE_PTHREADS) && defined(HAVE_CLOCK_NANOSLEEP)
#define PRECISE_TIMING 1
#define PRECISE_TIMING_POSIX 1
#elif defined(HAVE_PTHREADS) && defined(__MACH__)
#define PRECISE_TIMING 1
#define PRECISE_TIMING_MACH 1
#endif

// Timing functions
extern uint64 GetTicks_usec(void);
extern void Delay_usec(uint32 usec);

#ifdef HAVE_PTHREADS
// Setup pthread attributes
extern void Set_pthread_attr(pthread_attr_t *attr, int priority);
#endif

// Various definitions
typedef struct rgb_color {
        uint8           red;
        uint8           green;
        uint8           blue;
        uint8           alpha;
} rgb_color;

// X11 display fast locks
#if defined(HAVE_PTHREADS)
#define X11_LOCK_TYPE pthread_mutex_t
#define X11_LOCK_INIT PTHREAD_MUTEX_INITIALIZER
#define XDisplayLock() pthread_mutex_lock(&x_display_lock);
#define XDisplayUnlock() pthread_mutex_unlock(&x_display_lock);
#elif defined(HAVE_SPINLOCKS)
#define X11_LOCK_TYPE spinlock_t
#define X11_LOCK_INIT SPIN_LOCK_UNLOCKED
#define XDisplayLock() spin_lock(&x_display_lock)
#define XDisplayUnlock() spin_unlock(&x_display_lock)
#else
#define XDisplayLock()
#define XDisplayUnlock()
#endif
#ifdef X11_LOCK_TYPE
extern X11_LOCK_TYPE x_display_lock;
#endif

// Macro for calling MacOS routines
#define CallMacOS(type, tvect) call_macos((uintptr)tvect)
#define CallMacOS1(type, tvect, arg1) call_macos1((uintptr)tvect, (uintptr)arg1)
#define CallMacOS2(type, tvect, arg1, arg2) call_macos2((uintptr)tvect, (uintptr)arg1, (uintptr)arg2)
#define CallMacOS3(type, tvect, arg1, arg2, arg3) call_macos3((uintptr)tvect, (uintptr)arg1, (uintptr)arg2, (uintptr)arg3)
#define CallMacOS4(type, tvect, arg1, arg2, arg3, arg4) call_macos4((uintptr)tvect, (uintptr)arg1, (uintptr)arg2, (uintptr)arg3, (uintptr)arg4)
#define CallMacOS5(type, tvect, arg1, arg2, arg3, arg4, arg5) call_macos5((uintptr)tvect, (uintptr)arg1, (uintptr)arg2, (uintptr)arg3, (uintptr)arg4, (uintptr)arg5)
#define CallMacOS6(type, tvect, arg1, arg2, arg3, arg4, arg5, arg6) call_macos6((uintptr)tvect, (uintptr)arg1, (uintptr)arg2, (uintptr)arg3, (uintptr)arg4, (uintptr)arg5, (uintptr)arg6)
#define CallMacOS7(type, tvect, arg1, arg2, arg3, arg4, arg5, arg6, arg7) call_macos7((uintptr)tvect, (uintptr)arg1, (uintptr)arg2, (uintptr)arg3, (uintptr)arg4, (uintptr)arg5, (uintptr)arg6, (uintptr)arg7)

#ifdef __cplusplus
extern "C" {
#endif
extern uint32 call_macos(uint32 tvect);
extern uint32 call_macos1(uint32 tvect, uint32 arg1);
extern uint32 call_macos2(uint32 tvect, uint32 arg1, uint32 arg2);
extern uint32 call_macos3(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3);
extern uint32 call_macos4(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4);
extern uint32 call_macos5(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4, uint32 arg5);
extern uint32 call_macos6(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4, uint32 arg5, uint32 arg6);
extern uint32 call_macos7(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4, uint32 arg5, uint32 arg6, uint32 arg7);
#ifdef __cplusplus
}
#endif

#endif
Revision:	1.59
Committed:	2009-08-17T20:44:30Z (15 years, 2 months ago) by asvitkine
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.58:	+9 -0 lines
Log Message:	[Charles Srstka] Attached is a set of patches to port the precise timer that is currently used in the Linux and BeOS builds of SheepShaver to Mac OS X (and any other Mach-based operating systems). Currently, the Linux build uses the clock_gettime() function to get nanosecond-precision time, and falls back on gettimeofday() if it is not present. Unfortunately, Mac OS X does not currently support clock_gettime(), and gettimeofday() has only microsecond granularity. The Mach kernel, however, has a clock_get_time() function that does very nearly the same thing as clock_gettime(). The patches to BasiliskII cause the timing functions such as timer_current_time() to use clock_get_time() instead of gettimeofday() on Mach-based systems that do not support clock_gettime(). The changes to SheepShaver involve the precise timer. The existing code for Linux uses pthreads and real-time signals to handle the timing. Mac OS X unfortunately does not seem to support real-time signals, so Mach calls are again used to suspend and resume the timer thread in order to attempt to duplicate the Linux and BeOS versions of the timer. The code is somewhat ugly right now, as I decided to leave alone the pre-existing style of the source file, which unfortunately involves #ifdefs scattered throughout the file and some duplication of code. A future patch may want to clean this up to separate out the OS-specific code and put it all together at the top of the file. However, for the time being, this seems to work. This has not been extensively tested, because I have not been able to get my hands on a good test-case app for the classic Mac OS that would run inside the emulator and try out the timer. However, performance does seem to be better than with the pre-existing code, and nothing seems to have blown up as far as I can tell. I did find a game via a Google search - Cap'n Magneto - that is known to have problems with Basilisk/SheepShaver's legacy 60 Hz timer, and the opening fade-to-color for this game appears to run much more smoothly with the precise timer code in place.
#	Content
1	/*
2	* sysdeps.h - System dependent definitions for Linux
3	*
4	* SheepShaver (C) 1997-2008 Christian Bauer and Marc Hellwig
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19	*/
20
21	#ifndef SYSDEPS_H
22	#define SYSDEPS_H
23
24	#ifndef __STDC__
25	#error "Your compiler is not ANSI. Get a real one."
26	#endif
27
28	#include "config.h"
29	#include "user_strings_unix.h"
30
31	#ifndef STDC_HEADERS
32	#error "You don't have ANSI C header files."
33	#endif
34
35	#ifdef HAVE_UNISTD_H
36	# include <sys/types.h>
37	# include <unistd.h>
38	#endif
39
40	#include <netinet/in.h>
41	#include <assert.h>
42	#include <stdio.h>
43	#include <stdlib.h>
44	#include <stddef.h>
45	#include <string.h>
46	#include <signal.h>
47
48	#ifdef HAVE_PTHREADS
49	# include <pthread.h>
50	#endif
51
52	#ifdef HAVE_FCNTL_H
53	# include <fcntl.h>
54	#endif
55
56	#ifdef TIME_WITH_SYS_TIME
57	# include <sys/time.h>
58	# include <time.h>
59	#else
60	# ifdef HAVE_SYS_TIME_H
61	# include <sys/time.h>
62	# else
63	# include <time.h>
64	# endif
65	#endif
66
67	#ifdef __MACH__
68	#include <mach/mach_types.h>
69	#endif
70
71	// Fix offsetof() on FreeBSD and GCC >= 3.4
72	#if defined(__FreeBSD__) && defined(__cplusplus)
73	#undef offsetof
74	/* The cast to "char &" below avoids problems with user-defined
75	"operator &", which can appear in a POD type. */
76	#define offsetof(TYPE, MEMBER) \
77	(__offsetof__ (reinterpret_cast <size_t> \
78	(&reinterpret_cast <char &> \
79	(static_cast<TYPE *> (0)->MEMBER))))
80	#endif
81
82	// Define for external components
83	#define SHEEPSHAVER 1
84
85	// Always use Real Addressing mode on native architectures
86	// Otherwise, use Direct Addressing mode if NATMEM_OFFSET is set
87	#if !defined(EMULATED_PPC)
88	#define REAL_ADDRESSING 1
89	#include "ppc_asm.tmpl"
90	#elif defined(NATMEM_OFFSET)
91	#define DIRECT_ADDRESSING 1
92	#else
93	#define REAL_ADDRESSING 1
94	#endif
95
96	// Always use the complete non-stubs Ethernet driver
97	#define USE_ETHER_FULL_DRIVER 1
98
99	#define POWERPC_ROM 1
100
101	#if EMULATED_PPC
102	// Mac ROM is write protected when banked memory is used
103	#if REAL_ADDRESSING \|\| DIRECT_ADDRESSING
104	# define ROM_IS_WRITE_PROTECTED 0
105	# define USE_SCRATCHMEM_SUBTERFUGE 1
106	#else
107	# define ROM_IS_WRITE_PROTECTED 1
108	#endif
109	// Configure PowerPC emulator
110	#define PPC_REENTRANT_JIT 1
111	#define PPC_CHECK_INTERRUPTS 1
112	#define PPC_DECODE_CACHE 1
113	#define PPC_FLIGHT_RECORDER 1
114	#define PPC_PROFILE_COMPILE_TIME 0
115	#define PPC_PROFILE_GENERIC_CALLS 0
116	#define PPC_PROFILE_REGS_USE 0
117	#define KPX_MAX_CPUS 1
118	#if ENABLE_DYNGEN
119	#define PPC_ENABLE_JIT 1
120	#endif
121	#if defined(__i386__) \|\| defined(__x86_64__)
122	#define DYNGEN_ASM_OPTS 1
123	#endif
124	#else
125	// Mac ROM is write protected
126	#define ROM_IS_WRITE_PROTECTED 1
127	#define USE_SCRATCHMEM_SUBTERFUGE 0
128	#endif
129
130	// Data types
131	typedef unsigned char uint8;
132	typedef signed char int8;
133	#if SIZEOF_SHORT == 2
134	typedef unsigned short uint16;
135	typedef short int16;
136	#elif SIZEOF_INT == 2
137	typedef unsigned int uint16;
138	typedef int int16;
139	#else
140	#error "No 2 byte type, you lose."
141	#endif
142	#if SIZEOF_INT == 4
143	typedef unsigned int uint32;
144	typedef int int32;
145	#elif SIZEOF_LONG == 4
146	typedef unsigned long uint32;
147	typedef long int32;
148	#else
149	#error "No 4 byte type, you lose."
150	#endif
151	#if SIZEOF_LONG == 8
152	typedef unsigned long uint64;
153	typedef long int64;
154	#define VAL64(a) (a ## l)
155	#define UVAL64(a) (a ## ul)
156	#elif SIZEOF_LONG_LONG == 8
157	typedef unsigned long long uint64;
158	typedef long long int64;
159	#define VAL64(a) (a ## LL)
160	#define UVAL64(a) (a ## uLL)
161	#else
162	#error "No 8 byte type, you lose."
163	#endif
164	#if SIZEOF_VOID_P == 4
165	typedef uint32 uintptr;
166	typedef int32 intptr;
167	#elif SIZEOF_VOID_P == 8
168	typedef uint64 uintptr;
169	typedef int64 intptr;
170	#else
171	#error "Unsupported size of pointer"
172	#endif
173
174	// Define if the host processor supports fast unaligned load/stores
175	#if defined __i386__ \|\| defined __x86_64__
176	#define UNALIGNED_PROFITABLE 1
177	#endif
178
179
180	/**
181	* Helper functions to byteswap data
182	**/
183
184	#if defined(__GNUC__)
185	#if defined(__x86_64__) \|\| defined(__i386__)
186	// Linux/AMD64 currently has no asm optimized bswap_32() in <byteswap.h>
187	#define opt_bswap_32 do_opt_bswap_32
188	static inline uint32 do_opt_bswap_32(uint32 x)
189	{
190	uint32 v;
191	__asm__ __volatile__ ("bswap %0" : "=r" (v) : "0" (x));
192	return v;
193	}
194	#endif
195	#endif
196
197	#ifdef HAVE_BYTESWAP_H
198	#include <byteswap.h>
199	#endif
200
201	#ifdef opt_bswap_16
202	#undef bswap_16
203	#define bswap_16 opt_bswap_16
204	#endif
205	#ifndef bswap_16
206	#define bswap_16 generic_bswap_16
207	#endif
208
209	static inline uint16 generic_bswap_16(uint16 x)
210	{
211	return ((x & 0xff) << 8) \| ((x >> 8) & 0xff);
212	}
213
214	#ifdef opt_bswap_32
215	#undef bswap_32
216	#define bswap_32 opt_bswap_32
217	#endif
218	#ifndef bswap_32
219	#define bswap_32 generic_bswap_32
220	#endif
221
222	static inline uint32 generic_bswap_32(uint32 x)
223	{
224	return (((x & 0xff000000) >> 24) \|
225	((x & 0x00ff0000) >> 8) \|
226	((x & 0x0000ff00) << 8) \|
227	((x & 0x000000ff) << 24) );
228	}
229
230	#if defined(__i386__)
231	#define opt_bswap_64 do_opt_bswap_64
232	static inline uint64 do_opt_bswap_64(uint64 x)
233	{
234	return (bswap_32(x >> 32) \| (((uint64)bswap_32((uint32)x)) << 32));
235	}
236	#endif
237
238	#ifdef opt_bswap_64
239	#undef bswap_64
240	#define bswap_64 opt_bswap_64
241	#endif
242	#ifndef bswap_64
243	#define bswap_64 generic_bswap_64
244	#endif
245
246	static inline uint64 generic_bswap_64(uint64 x)
247	{
248	return (((x & UVAL64(0xff00000000000000)) >> 56) \|
249	((x & UVAL64(0x00ff000000000000)) >> 40) \|
250	((x & UVAL64(0x0000ff0000000000)) >> 24) \|
251	((x & UVAL64(0x000000ff00000000)) >> 8) \|
252	((x & UVAL64(0x00000000ff000000)) << 8) \|
253	((x & UVAL64(0x0000000000ff0000)) << 24) \|
254	((x & UVAL64(0x000000000000ff00)) << 40) \|
255	((x & UVAL64(0x00000000000000ff)) << 56) );
256	}
257
258	#ifdef WORDS_BIGENDIAN
259	static inline uint16 tswap16(uint16 x) { return x; }
260	static inline uint32 tswap32(uint32 x) { return x; }
261	static inline uint64 tswap64(uint64 x) { return x; }
262	#else
263	static inline uint16 tswap16(uint16 x) { return bswap_16(x); }
264	static inline uint32 tswap32(uint32 x) { return bswap_32(x); }
265	static inline uint64 tswap64(uint64 x) { return bswap_64(x); }
266	#endif
267
268	// spin locks
269	#ifdef __GNUC__
270
271	#if defined(__powerpc__) \|\| defined(__ppc__)
272	#define HAVE_TEST_AND_SET 1
273	static inline int testandset(volatile int *p)
274	{
275	int ret;
276	__asm__ __volatile__("0: lwarx %0,0,%1\n"
277	" xor. %0,%3,%0\n"
278	" bne 1f\n"
279	" stwcx. %2,0,%1\n"
280	" bne- 0b\n"
281	"1: "
282	: "=&r" (ret)
283	: "r" (p), "r" (1), "r" (0)
284	: "cr0", "memory");
285	return ret;
286	}
287	#endif
288
289	#if defined(__i386__) \|\| defined(__x86_64__)
290	#define HAVE_TEST_AND_SET 1
291	static inline int testandset(volatile int *p)
292	{
293	long int ret;
294	/* Note: the "xchg" instruction does not need a "lock" prefix */
295	__asm__ __volatile__("xchgl %k0, %1"
296	: "=r" (ret), "=m" (*p)
297	: "0" (1), "m" (*p)
298	: "memory");
299	return ret;
300	}
301	#endif
302
303	#ifdef __s390__
304	#define HAVE_TEST_AND_SET 1
305	static inline int testandset(volatile int *p)
306	{
307	int ret;
308
309	__asm__ __volatile__("0: cs %0,%1,0(%2)\n"
310	" jl 0b"
311	: "=&d" (ret)
312	: "r" (1), "a" (p), "0" (*p)
313	: "cc", "memory" );
314	return ret;
315	}
316	#endif
317
318	#ifdef __alpha__
319	#define HAVE_TEST_AND_SET 1
320	static inline int testandset(volatile int *p)
321	{
322	int ret;
323	unsigned long one;
324
325	__asm__ __volatile__("0: mov 1,%2\n"
326	" ldl_l %0,%1\n"
327	" stl_c %2,%1\n"
328	" beq %2,1f\n"
329	".subsection 2\n"
330	"1: br 0b\n"
331	".previous"
332	: "=r" (ret), "=m" (*p), "=r" (one)
333	: "m" (*p));
334	return ret;
335	}
336	#endif
337
338	#ifdef __sparc__
339	#define HAVE_TEST_AND_SET 1
340	static inline int testandset(volatile int *p)
341	{
342	int ret;
343
344	__asm__ __volatile__("ldstub [%1], %0"
345	: "=r" (ret)
346	: "r" (p)
347	: "memory");
348
349	return (ret ? 1 : 0);
350	}
351	#endif
352
353	#ifdef __arm__
354	#define HAVE_TEST_AND_SET 1
355	static inline int testandset(volatile int *p)
356	{
357	register unsigned int ret;
358	__asm__ __volatile__("swp %0, %1, [%2]"
359	: "=r"(ret)
360	: "0"(1), "r"(p));
361
362	return ret;
363	}
364	#endif
365
366	#endif /* __GNUC__ */
367
368	typedef volatile int spinlock_t;
369
370	static const spinlock_t SPIN_LOCK_UNLOCKED = 0;
371
372	#if defined(HAVE_TEST_AND_SET) && defined(HAVE_PTHREADS)
373	// There is nothing to lock if we are not in an multithreaded environment
374	#define HAVE_SPINLOCKS 1
375	static inline void spin_lock(spinlock_t *lock)
376	{
377	while (testandset(lock));
378	}
379
380	static inline void spin_unlock(spinlock_t *lock)
381	{
382	*lock = 0;
383	}
384
385	static inline int spin_trylock(spinlock_t *lock)
386	{
387	return !testandset(lock);
388	}
389	#else
390	static inline void spin_lock(spinlock_t *lock)
391	{
392	}
393
394	static inline void spin_unlock(spinlock_t *lock)
395	{
396	}
397
398	static inline int spin_trylock(spinlock_t *lock)
399	{
400	return 1;
401	}
402	#endif
403
404	// Time data type for Time Manager emulation
405	#ifdef HAVE_CLOCK_GETTIME
406	typedef struct timespec tm_time_t;
407	#elif defined(__MACH__)
408	typedef mach_timespec_t tm_time_t;
409	#else
410	typedef struct timeval tm_time_t;
411	#endif
412
413	/* Define codes for all the float formats that we know of.
414	* Though we only handle IEEE format. */
415	#define UNKNOWN_FLOAT_FORMAT 0
416	#define IEEE_FLOAT_FORMAT 1
417	#define VAX_FLOAT_FORMAT 2
418	#define IBM_FLOAT_FORMAT 3
419	#define C4X_FLOAT_FORMAT 4
420
421	// High-precision timing
422	#if defined(HAVE_PTHREADS) && defined(HAVE_CLOCK_NANOSLEEP)
423	#define PRECISE_TIMING 1
424	#define PRECISE_TIMING_POSIX 1
425	#elif defined(HAVE_PTHREADS) && defined(__MACH__)
426	#define PRECISE_TIMING 1
427	#define PRECISE_TIMING_MACH 1
428	#endif
429
430	// Timing functions
431	extern uint64 GetTicks_usec(void);
432	extern void Delay_usec(uint32 usec);
433
434	#ifdef HAVE_PTHREADS
435	// Setup pthread attributes
436	extern void Set_pthread_attr(pthread_attr_t *attr, int priority);
437	#endif
438
439	// Various definitions
440	typedef struct rgb_color {
441	uint8 red;
442	uint8 green;
443	uint8 blue;
444	uint8 alpha;
445	} rgb_color;
446
447	// X11 display fast locks
448	#if defined(HAVE_PTHREADS)
449	#define X11_LOCK_TYPE pthread_mutex_t
450	#define X11_LOCK_INIT PTHREAD_MUTEX_INITIALIZER
451	#define XDisplayLock() pthread_mutex_lock(&x_display_lock);
452	#define XDisplayUnlock() pthread_mutex_unlock(&x_display_lock);
453	#elif defined(HAVE_SPINLOCKS)
454	#define X11_LOCK_TYPE spinlock_t
455	#define X11_LOCK_INIT SPIN_LOCK_UNLOCKED
456	#define XDisplayLock() spin_lock(&x_display_lock)
457	#define XDisplayUnlock() spin_unlock(&x_display_lock)
458	#else
459	#define XDisplayLock()
460	#define XDisplayUnlock()
461	#endif
462	#ifdef X11_LOCK_TYPE
463	extern X11_LOCK_TYPE x_display_lock;
464	#endif
465
466	// Macro for calling MacOS routines
467	#define CallMacOS(type, tvect) call_macos((uintptr)tvect)
468	#define CallMacOS1(type, tvect, arg1) call_macos1((uintptr)tvect, (uintptr)arg1)
469	#define CallMacOS2(type, tvect, arg1, arg2) call_macos2((uintptr)tvect, (uintptr)arg1, (uintptr)arg2)
470	#define CallMacOS3(type, tvect, arg1, arg2, arg3) call_macos3((uintptr)tvect, (uintptr)arg1, (uintptr)arg2, (uintptr)arg3)
471	#define CallMacOS4(type, tvect, arg1, arg2, arg3, arg4) call_macos4((uintptr)tvect, (uintptr)arg1, (uintptr)arg2, (uintptr)arg3, (uintptr)arg4)
472	#define CallMacOS5(type, tvect, arg1, arg2, arg3, arg4, arg5) call_macos5((uintptr)tvect, (uintptr)arg1, (uintptr)arg2, (uintptr)arg3, (uintptr)arg4, (uintptr)arg5)
473	#define CallMacOS6(type, tvect, arg1, arg2, arg3, arg4, arg5, arg6) call_macos6((uintptr)tvect, (uintptr)arg1, (uintptr)arg2, (uintptr)arg3, (uintptr)arg4, (uintptr)arg5, (uintptr)arg6)
474	#define CallMacOS7(type, tvect, arg1, arg2, arg3, arg4, arg5, arg6, arg7) call_macos7((uintptr)tvect, (uintptr)arg1, (uintptr)arg2, (uintptr)arg3, (uintptr)arg4, (uintptr)arg5, (uintptr)arg6, (uintptr)arg7)
475
476	#ifdef __cplusplus
477	extern "C" {
478	#endif
479	extern uint32 call_macos(uint32 tvect);
480	extern uint32 call_macos1(uint32 tvect, uint32 arg1);
481	extern uint32 call_macos2(uint32 tvect, uint32 arg1, uint32 arg2);
482	extern uint32 call_macos3(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3);
483	extern uint32 call_macos4(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4);
484	extern uint32 call_macos5(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4, uint32 arg5);
485	extern uint32 call_macos6(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4, uint32 arg5, uint32 arg6);
486	extern uint32 call_macos7(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4, uint32 arg5, uint32 arg6, uint32 arg7);
487	#ifdef __cplusplus
488	}
489	#endif
490
491	#endif