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| Current File : //compat/linux/proc/68247/root/compat/linux/proc/68247/root/compat/linux/proc/3760/cwd/usr/local/include/xf86drm.h |
/**
* \file xf86drm.h
* OS-independent header for DRM user-level library interface.
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
*/
/*
* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
#ifndef _XF86DRM_H_
#define _XF86DRM_H_
#include <stdarg.h>
#include <sys/types.h>
#include <stdint.h>
#include <drm.h>
/* Defaults, if nothing set in xf86config */
#define DRM_DEV_UID 0
#define DRM_DEV_GID 0
/* Default /dev/dri directory permissions 0755 */
#define DRM_DEV_DIRMODE \
(S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
#define DRM_DEV_MODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
#define DRM_DIR_NAME "/dev/dri"
#define DRM_DEV_NAME "%s/card%d"
#define DRM_CONTROL_DEV_NAME "%s/controlD%d"
#define DRM_PROC_NAME "/proc/dri/" /* For backward Linux compatibility */
#define DRM_ERR_NO_DEVICE (-1001)
#define DRM_ERR_NO_ACCESS (-1002)
#define DRM_ERR_NOT_ROOT (-1003)
#define DRM_ERR_INVALID (-1004)
#define DRM_ERR_NO_FD (-1005)
#define DRM_AGP_NO_HANDLE 0
typedef unsigned int drmSize, *drmSizePtr; /**< For mapped regions */
typedef void *drmAddress, **drmAddressPtr; /**< For mapped regions */
typedef struct _drmServerInfo {
int (*debug_print)(const char *format, va_list ap);
int (*load_module)(const char *name);
void (*get_perms)(gid_t *, mode_t *);
} drmServerInfo, *drmServerInfoPtr;
typedef struct drmHashEntry {
int fd;
void (*f)(int, void *, void *);
void *tagTable;
} drmHashEntry;
extern int drmIoctl(int fd, unsigned long request, void *arg);
extern void *drmGetHashTable(void);
extern drmHashEntry *drmGetEntry(int fd);
/**
* Driver version information.
*
* \sa drmGetVersion() and drmSetVersion().
*/
typedef struct _drmVersion {
int version_major; /**< Major version */
int version_minor; /**< Minor version */
int version_patchlevel; /**< Patch level */
int name_len; /**< Length of name buffer */
char *name; /**< Name of driver */
int date_len; /**< Length of date buffer */
char *date; /**< User-space buffer to hold date */
int desc_len; /**< Length of desc buffer */
char *desc; /**< User-space buffer to hold desc */
} drmVersion, *drmVersionPtr;
typedef struct _drmStats {
unsigned long count; /**< Number of data */
struct {
unsigned long value; /**< Value from kernel */
const char *long_format; /**< Suggested format for long_name */
const char *long_name; /**< Long name for value */
const char *rate_format; /**< Suggested format for rate_name */
const char *rate_name; /**< Short name for value per second */
int isvalue; /**< True if value (vs. counter) */
const char *mult_names; /**< Multiplier names (e.g., "KGM") */
int mult; /**< Multiplier value (e.g., 1024) */
int verbose; /**< Suggest only in verbose output */
} data[15];
} drmStatsT;
/* All of these enums *MUST* match with the
kernel implementation -- so do *NOT*
change them! (The drmlib implementation
will just copy the flags instead of
translating them.) */
typedef enum {
DRM_FRAME_BUFFER = 0, /**< WC, no caching, no core dump */
DRM_REGISTERS = 1, /**< no caching, no core dump */
DRM_SHM = 2, /**< shared, cached */
DRM_AGP = 3, /**< AGP/GART */
DRM_SCATTER_GATHER = 4, /**< PCI scatter/gather */
DRM_CONSISTENT = 5 /**< PCI consistent */
} drmMapType;
typedef enum {
DRM_RESTRICTED = 0x0001, /**< Cannot be mapped to client-virtual */
DRM_READ_ONLY = 0x0002, /**< Read-only in client-virtual */
DRM_LOCKED = 0x0004, /**< Physical pages locked */
DRM_KERNEL = 0x0008, /**< Kernel requires access */
DRM_WRITE_COMBINING = 0x0010, /**< Use write-combining, if available */
DRM_CONTAINS_LOCK = 0x0020, /**< SHM page that contains lock */
DRM_REMOVABLE = 0x0040 /**< Removable mapping */
} drmMapFlags;
/**
* \warning These values *MUST* match drm.h
*/
typedef enum {
/** \name Flags for DMA buffer dispatch */
/*@{*/
DRM_DMA_BLOCK = 0x01, /**<
* Block until buffer dispatched.
*
* \note the buffer may not yet have been
* processed by the hardware -- getting a
* hardware lock with the hardware quiescent
* will ensure that the buffer has been
* processed.
*/
DRM_DMA_WHILE_LOCKED = 0x02, /**< Dispatch while lock held */
DRM_DMA_PRIORITY = 0x04, /**< High priority dispatch */
/*@}*/
/** \name Flags for DMA buffer request */
/*@{*/
DRM_DMA_WAIT = 0x10, /**< Wait for free buffers */
DRM_DMA_SMALLER_OK = 0x20, /**< Smaller-than-requested buffers OK */
DRM_DMA_LARGER_OK = 0x40 /**< Larger-than-requested buffers OK */
/*@}*/
} drmDMAFlags;
typedef enum {
DRM_PAGE_ALIGN = 0x01,
DRM_AGP_BUFFER = 0x02,
DRM_SG_BUFFER = 0x04,
DRM_FB_BUFFER = 0x08,
DRM_PCI_BUFFER_RO = 0x10
} drmBufDescFlags;
typedef enum {
DRM_LOCK_READY = 0x01, /**< Wait until hardware is ready for DMA */
DRM_LOCK_QUIESCENT = 0x02, /**< Wait until hardware quiescent */
DRM_LOCK_FLUSH = 0x04, /**< Flush this context's DMA queue first */
DRM_LOCK_FLUSH_ALL = 0x08, /**< Flush all DMA queues first */
/* These *HALT* flags aren't supported yet
-- they will be used to support the
full-screen DGA-like mode. */
DRM_HALT_ALL_QUEUES = 0x10, /**< Halt all current and future queues */
DRM_HALT_CUR_QUEUES = 0x20 /**< Halt all current queues */
} drmLockFlags;
typedef enum {
DRM_CONTEXT_PRESERVED = 0x01, /**< This context is preserved and
never swapped. */
DRM_CONTEXT_2DONLY = 0x02 /**< This context is for 2D rendering only. */
} drm_context_tFlags, *drm_context_tFlagsPtr;
typedef struct _drmBufDesc {
int count; /**< Number of buffers of this size */
int size; /**< Size in bytes */
int low_mark; /**< Low water mark */
int high_mark; /**< High water mark */
} drmBufDesc, *drmBufDescPtr;
typedef struct _drmBufInfo {
int count; /**< Number of buffers described in list */
drmBufDescPtr list; /**< List of buffer descriptions */
} drmBufInfo, *drmBufInfoPtr;
typedef struct _drmBuf {
int idx; /**< Index into the master buffer list */
int total; /**< Buffer size */
int used; /**< Amount of buffer in use (for DMA) */
drmAddress address; /**< Address */
} drmBuf, *drmBufPtr;
/**
* Buffer mapping information.
*
* Used by drmMapBufs() and drmUnmapBufs() to store information about the
* mapped buffers.
*/
typedef struct _drmBufMap {
int count; /**< Number of buffers mapped */
drmBufPtr list; /**< Buffers */
} drmBufMap, *drmBufMapPtr;
typedef struct _drmLock {
volatile unsigned int lock;
char padding[60];
/* This is big enough for most current (and future?) architectures:
DEC Alpha: 32 bytes
Intel Merced: ?
Intel P5/PPro/PII/PIII: 32 bytes
Intel StrongARM: 32 bytes
Intel i386/i486: 16 bytes
MIPS: 32 bytes (?)
Motorola 68k: 16 bytes
Motorola PowerPC: 32 bytes
Sun SPARC: 32 bytes
*/
} drmLock, *drmLockPtr;
/**
* Indices here refer to the offset into
* list in drmBufInfo
*/
typedef struct _drmDMAReq {
drm_context_t context; /**< Context handle */
int send_count; /**< Number of buffers to send */
int *send_list; /**< List of handles to buffers */
int *send_sizes; /**< Lengths of data to send, in bytes */
drmDMAFlags flags; /**< Flags */
int request_count; /**< Number of buffers requested */
int request_size; /**< Desired size of buffers requested */
int *request_list; /**< Buffer information */
int *request_sizes; /**< Minimum acceptable sizes */
int granted_count; /**< Number of buffers granted at this size */
} drmDMAReq, *drmDMAReqPtr;
typedef struct _drmRegion {
drm_handle_t handle;
unsigned int offset;
drmSize size;
drmAddress map;
} drmRegion, *drmRegionPtr;
typedef struct _drmTextureRegion {
unsigned char next;
unsigned char prev;
unsigned char in_use;
unsigned char padding; /**< Explicitly pad this out */
unsigned int age;
} drmTextureRegion, *drmTextureRegionPtr;
typedef enum {
DRM_VBLANK_ABSOLUTE = 0x0, /**< Wait for specific vblank sequence number */
DRM_VBLANK_RELATIVE = 0x1, /**< Wait for given number of vblanks */
DRM_VBLANK_FLIP = 0x8000000, /**< Scheduled buffer swap should flip */
DRM_VBLANK_NEXTONMISS = 0x10000000, /**< If missed, wait for next vblank */
DRM_VBLANK_SECONDARY = 0x20000000, /**< Secondary display controller */
DRM_VBLANK_SIGNAL = 0x40000000 /* Send signal instead of blocking */
} drmVBlankSeqType;
typedef struct _drmVBlankReq {
drmVBlankSeqType type;
unsigned int sequence;
unsigned long signal;
} drmVBlankReq, *drmVBlankReqPtr;
typedef struct _drmVBlankReply {
drmVBlankSeqType type;
unsigned int sequence;
long tval_sec;
long tval_usec;
} drmVBlankReply, *drmVBlankReplyPtr;
typedef union _drmVBlank {
drmVBlankReq request;
drmVBlankReply reply;
} drmVBlank, *drmVBlankPtr;
typedef struct _drmSetVersion {
int drm_di_major;
int drm_di_minor;
int drm_dd_major;
int drm_dd_minor;
} drmSetVersion, *drmSetVersionPtr;
#define __drm_dummy_lock(lock) (*(__volatile__ unsigned int *)lock)
#define DRM_LOCK_HELD 0x80000000U /**< Hardware lock is held */
#define DRM_LOCK_CONT 0x40000000U /**< Hardware lock is contended */
#if defined(__GNUC__) && (__GNUC__ >= 2)
# if defined(__i386) || defined(__AMD64__) || defined(__x86_64__) || defined(__amd64__)
/* Reflect changes here to drmP.h */
#define DRM_CAS(lock,old,new,__ret) \
do { \
int __dummy; /* Can't mark eax as clobbered */ \
__asm__ __volatile__( \
"lock ; cmpxchg %4,%1\n\t" \
"setnz %0" \
: "=d" (__ret), \
"=m" (__drm_dummy_lock(lock)), \
"=a" (__dummy) \
: "2" (old), \
"r" (new)); \
} while (0)
#elif defined(__alpha__)
#define DRM_CAS(lock, old, new, ret) \
do { \
int tmp, old32; \
__asm__ __volatile__( \
" addl $31, %5, %3\n" \
"1: ldl_l %0, %2\n" \
" cmpeq %0, %3, %1\n" \
" beq %1, 2f\n" \
" mov %4, %0\n" \
" stl_c %0, %2\n" \
" beq %0, 3f\n" \
" mb\n" \
"2: cmpeq %1, 0, %1\n" \
".subsection 2\n" \
"3: br 1b\n" \
".previous" \
: "=&r"(tmp), "=&r"(ret), \
"=m"(__drm_dummy_lock(lock)), \
"=&r"(old32) \
: "r"(new), "r"(old) \
: "memory"); \
} while (0)
#elif defined(__sparc__)
#define DRM_CAS(lock,old,new,__ret) \
do { register unsigned int __old __asm("o0"); \
register unsigned int __new __asm("o1"); \
register volatile unsigned int *__lock __asm("o2"); \
__old = old; \
__new = new; \
__lock = (volatile unsigned int *)lock; \
__asm__ __volatile__( \
/*"cas [%2], %3, %0"*/ \
".word 0xd3e29008\n\t" \
/*"membar #StoreStore | #StoreLoad"*/ \
".word 0x8143e00a" \
: "=&r" (__new) \
: "0" (__new), \
"r" (__lock), \
"r" (__old) \
: "memory"); \
__ret = (__new != __old); \
} while(0)
#elif defined(__ia64__)
#ifdef __INTEL_COMPILER
/* this currently generates bad code (missing stop bits)... */
#include <ia64intrin.h>
#define DRM_CAS(lock,old,new,__ret) \
do { \
unsigned long __result, __old = (old) & 0xffffffff; \
__mf(); \
__result = _InterlockedCompareExchange_acq(&__drm_dummy_lock(lock), (new), __old);\
__ret = (__result) != (__old); \
/* __ret = (__sync_val_compare_and_swap(&__drm_dummy_lock(lock), \
(old), (new)) \
!= (old)); */\
} while (0)
#else
#define DRM_CAS(lock,old,new,__ret) \
do { \
unsigned int __result, __old = (old); \
__asm__ __volatile__( \
"mf\n" \
"mov ar.ccv=%2\n" \
";;\n" \
"cmpxchg4.acq %0=%1,%3,ar.ccv" \
: "=r" (__result), "=m" (__drm_dummy_lock(lock)) \
: "r" ((unsigned long)__old), "r" (new) \
: "memory"); \
__ret = (__result) != (__old); \
} while (0)
#endif
#elif defined(__powerpc__)
#define DRM_CAS(lock,old,new,__ret) \
do { \
__asm__ __volatile__( \
"sync;" \
"0: lwarx %0,0,%1;" \
" xor. %0,%3,%0;" \
" bne 1f;" \
" stwcx. %2,0,%1;" \
" bne- 0b;" \
"1: " \
"sync;" \
: "=&r"(__ret) \
: "r"(lock), "r"(new), "r"(old) \
: "cr0", "memory"); \
} while (0)
#endif /* architecture */
#endif /* __GNUC__ >= 2 */
#ifndef DRM_CAS
#define DRM_CAS(lock,old,new,ret) do { ret=1; } while (0) /* FAST LOCK FAILS */
#endif
#if defined(__alpha__)
#define DRM_CAS_RESULT(_result) long _result
#elif defined(__powerpc__)
#define DRM_CAS_RESULT(_result) int _result
#else
#define DRM_CAS_RESULT(_result) char _result
#endif
#define DRM_LIGHT_LOCK(fd,lock,context) \
do { \
DRM_CAS_RESULT(__ret); \
DRM_CAS(lock,context,DRM_LOCK_HELD|context,__ret); \
if (__ret) drmGetLock(fd,context,0); \
} while(0)
/* This one counts fast locks -- for
benchmarking only. */
#define DRM_LIGHT_LOCK_COUNT(fd,lock,context,count) \
do { \
DRM_CAS_RESULT(__ret); \
DRM_CAS(lock,context,DRM_LOCK_HELD|context,__ret); \
if (__ret) drmGetLock(fd,context,0); \
else ++count; \
} while(0)
#define DRM_LOCK(fd,lock,context,flags) \
do { \
if (flags) drmGetLock(fd,context,flags); \
else DRM_LIGHT_LOCK(fd,lock,context); \
} while(0)
#define DRM_UNLOCK(fd,lock,context) \
do { \
DRM_CAS_RESULT(__ret); \
DRM_CAS(lock,DRM_LOCK_HELD|context,context,__ret); \
if (__ret) drmUnlock(fd,context); \
} while(0)
/* Simple spin locks */
#define DRM_SPINLOCK(spin,val) \
do { \
DRM_CAS_RESULT(__ret); \
do { \
DRM_CAS(spin,0,val,__ret); \
if (__ret) while ((spin)->lock); \
} while (__ret); \
} while(0)
#define DRM_SPINLOCK_TAKE(spin,val) \
do { \
DRM_CAS_RESULT(__ret); \
int cur; \
do { \
cur = (*spin).lock; \
DRM_CAS(spin,cur,val,__ret); \
} while (__ret); \
} while(0)
#define DRM_SPINLOCK_COUNT(spin,val,count,__ret) \
do { \
int __i; \
__ret = 1; \
for (__i = 0; __ret && __i < count; __i++) { \
DRM_CAS(spin,0,val,__ret); \
if (__ret) for (;__i < count && (spin)->lock; __i++); \
} \
} while(0)
#define DRM_SPINUNLOCK(spin,val) \
do { \
DRM_CAS_RESULT(__ret); \
if ((*spin).lock == val) { /* else server stole lock */ \
do { \
DRM_CAS(spin,val,0,__ret); \
} while (__ret); \
} \
} while(0)
/* General user-level programmer's API: unprivileged */
extern int drmAvailable(void);
extern int drmOpen(const char *name, const char *busid);
extern int drmOpenControl(int minor);
extern int drmClose(int fd);
extern drmVersionPtr drmGetVersion(int fd);
extern drmVersionPtr drmGetLibVersion(int fd);
extern void drmFreeVersion(drmVersionPtr);
extern int drmGetMagic(int fd, drm_magic_t * magic);
extern char *drmGetBusid(int fd);
extern int drmGetInterruptFromBusID(int fd, int busnum, int devnum,
int funcnum);
extern int drmGetMap(int fd, int idx, drm_handle_t *offset,
drmSize *size, drmMapType *type,
drmMapFlags *flags, drm_handle_t *handle,
int *mtrr);
extern int drmGetClient(int fd, int idx, int *auth, int *pid,
int *uid, unsigned long *magic,
unsigned long *iocs);
extern int drmGetStats(int fd, drmStatsT *stats);
extern int drmSetInterfaceVersion(int fd, drmSetVersion *version);
extern int drmCommandNone(int fd, unsigned long drmCommandIndex);
extern int drmCommandRead(int fd, unsigned long drmCommandIndex,
void *data, unsigned long size);
extern int drmCommandWrite(int fd, unsigned long drmCommandIndex,
void *data, unsigned long size);
extern int drmCommandWriteRead(int fd, unsigned long drmCommandIndex,
void *data, unsigned long size);
/* General user-level programmer's API: X server (root) only */
extern void drmFreeBusid(const char *busid);
extern int drmSetBusid(int fd, const char *busid);
extern int drmAuthMagic(int fd, drm_magic_t magic);
extern int drmAddMap(int fd,
drm_handle_t offset,
drmSize size,
drmMapType type,
drmMapFlags flags,
drm_handle_t * handle);
extern int drmRmMap(int fd, drm_handle_t handle);
extern int drmAddContextPrivateMapping(int fd, drm_context_t ctx_id,
drm_handle_t handle);
extern int drmAddBufs(int fd, int count, int size,
drmBufDescFlags flags,
int agp_offset);
extern int drmMarkBufs(int fd, double low, double high);
extern int drmCreateContext(int fd, drm_context_t * handle);
extern int drmSetContextFlags(int fd, drm_context_t context,
drm_context_tFlags flags);
extern int drmGetContextFlags(int fd, drm_context_t context,
drm_context_tFlagsPtr flags);
extern int drmAddContextTag(int fd, drm_context_t context, void *tag);
extern int drmDelContextTag(int fd, drm_context_t context);
extern void *drmGetContextTag(int fd, drm_context_t context);
extern drm_context_t * drmGetReservedContextList(int fd, int *count);
extern void drmFreeReservedContextList(drm_context_t *);
extern int drmSwitchToContext(int fd, drm_context_t context);
extern int drmDestroyContext(int fd, drm_context_t handle);
extern int drmCreateDrawable(int fd, drm_drawable_t * handle);
extern int drmDestroyDrawable(int fd, drm_drawable_t handle);
extern int drmUpdateDrawableInfo(int fd, drm_drawable_t handle,
drm_drawable_info_type_t type,
unsigned int num, void *data);
extern int drmCtlInstHandler(int fd, int irq);
extern int drmCtlUninstHandler(int fd);
/* General user-level programmer's API: authenticated client and/or X */
extern int drmMap(int fd,
drm_handle_t handle,
drmSize size,
drmAddressPtr address);
extern int drmUnmap(drmAddress address, drmSize size);
extern drmBufInfoPtr drmGetBufInfo(int fd);
extern drmBufMapPtr drmMapBufs(int fd);
extern int drmUnmapBufs(drmBufMapPtr bufs);
extern int drmDMA(int fd, drmDMAReqPtr request);
extern int drmFreeBufs(int fd, int count, int *list);
extern int drmGetLock(int fd,
drm_context_t context,
drmLockFlags flags);
extern int drmUnlock(int fd, drm_context_t context);
extern int drmFinish(int fd, int context, drmLockFlags flags);
extern int drmGetContextPrivateMapping(int fd, drm_context_t ctx_id,
drm_handle_t * handle);
/* AGP/GART support: X server (root) only */
extern int drmAgpAcquire(int fd);
extern int drmAgpRelease(int fd);
extern int drmAgpEnable(int fd, unsigned long mode);
extern int drmAgpAlloc(int fd, unsigned long size,
unsigned long type, unsigned long *address,
drm_handle_t *handle);
extern int drmAgpFree(int fd, drm_handle_t handle);
extern int drmAgpBind(int fd, drm_handle_t handle,
unsigned long offset);
extern int drmAgpUnbind(int fd, drm_handle_t handle);
/* AGP/GART info: authenticated client and/or X */
extern int drmAgpVersionMajor(int fd);
extern int drmAgpVersionMinor(int fd);
extern unsigned long drmAgpGetMode(int fd);
extern unsigned long drmAgpBase(int fd); /* Physical location */
extern unsigned long drmAgpSize(int fd); /* Bytes */
extern unsigned long drmAgpMemoryUsed(int fd);
extern unsigned long drmAgpMemoryAvail(int fd);
extern unsigned int drmAgpVendorId(int fd);
extern unsigned int drmAgpDeviceId(int fd);
/* PCI scatter/gather support: X server (root) only */
extern int drmScatterGatherAlloc(int fd, unsigned long size,
drm_handle_t *handle);
extern int drmScatterGatherFree(int fd, drm_handle_t handle);
extern int drmWaitVBlank(int fd, drmVBlankPtr vbl);
/* Support routines */
extern void drmSetServerInfo(drmServerInfoPtr info);
extern int drmError(int err, const char *label);
extern void *drmMalloc(int size);
extern void drmFree(void *pt);
/* Hash table routines */
extern void *drmHashCreate(void);
extern int drmHashDestroy(void *t);
extern int drmHashLookup(void *t, unsigned long key, void **value);
extern int drmHashInsert(void *t, unsigned long key, void *value);
extern int drmHashDelete(void *t, unsigned long key);
extern int drmHashFirst(void *t, unsigned long *key, void **value);
extern int drmHashNext(void *t, unsigned long *key, void **value);
/* PRNG routines */
extern void *drmRandomCreate(unsigned long seed);
extern int drmRandomDestroy(void *state);
extern unsigned long drmRandom(void *state);
extern double drmRandomDouble(void *state);
/* Skip list routines */
extern void *drmSLCreate(void);
extern int drmSLDestroy(void *l);
extern int drmSLLookup(void *l, unsigned long key, void **value);
extern int drmSLInsert(void *l, unsigned long key, void *value);
extern int drmSLDelete(void *l, unsigned long key);
extern int drmSLNext(void *l, unsigned long *key, void **value);
extern int drmSLFirst(void *l, unsigned long *key, void **value);
extern void drmSLDump(void *l);
extern int drmSLLookupNeighbors(void *l, unsigned long key,
unsigned long *prev_key, void **prev_value,
unsigned long *next_key, void **next_value);
extern int drmOpenOnce(void *unused, const char *BusID, int *newlyopened);
extern void drmCloseOnce(int fd);
extern void drmMsg(const char *format, ...);
extern int drmSetMaster(int fd);
extern int drmDropMaster(int fd);
#endif