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ape
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qlock.h

qlock.h 508 B
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  1. #ifndef _PLAN9_SOURCE
    2. 

  2.   This header file is an extension to ANSI/POSIX
    3. 

  3. #endif
    4. 

  4. 

  5. #ifndef __QLOCK_H_
    6. 

  6. #define __QLOCK_H_
    7. 

  7. #pragma lib "/$M/lib/ape/lib9.a"
    8. 

  8. 

  9. #include <u.h>
    10. 

  10. #include <lock.h>
    11. 

  11. 

  12. typedef struct QLp QLp;
    13. 

  13. struct QLp
    14. 

  14. {
    15. 

  15. 	int	inuse;
    16. 

  16. 	QLp	*next;
    17. 

  17. 	char	state;
    18. 

  18. };
    19. 

  19. 

  20. typedef
    21. 

  21. struct QLock
    22. 

  22. {
    23. 

  23. 	Lock	lock;
    24. 

  24. 	int	locked;
    25. 

  25. 	QLp	*head;
    26. 

  26. 	QLp 	*tail;
    27. 

  27. } QLock;
    28. 

  28. 

  29. #ifdef __cplusplus
    30. 

  30. extern "C" {
    31. 

  31. #endif
    32. 

  32. 

  33. extern	void	qlock(QLock*);
    34. 

  34. extern	void	qunlock(QLock*);
    35. 

  35. extern	int	canqlock(QLock*);
    36. 

  36. 

  37. #ifdef __cplusplus
    38. 

  38. }
    39. 

  39. #endif
    40. 

  40. 

  41. #endif
    42.