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src/core/ngx_shmtx.h - nginx-1.7.10

Data types defined

Macros defined

Source code


  2. /*
  3. * Copyright (C) Igor Sysoev
  4. * Copyright (C) Nginx, Inc.
  5. */


  8. #ifndef _NGX_SHMTX_H_INCLUDED_
  9. ‌#define _NGX_SHMTX_H_INCLUDED_


  12. #include <ngx_config.h>
  13. #include <ngx_core.h>


  16. typedef struct {
  17.     ngx_atomic_t   lock;
  18. #if (NGX_HAVE_POSIX_SEM)
  19.     ngx_atomic_t   wait;
  20. #endif
  21. ‌} ngx_shmtx_sh_t;


  24. typedef struct {
  25. #if (NGX_HAVE_ATOMIC_OPS)
  26.     ngx_atomic_t  *lock;
  27. #if (NGX_HAVE_POSIX_SEM)
  28.     ngx_atomic_t  *wait;
  29.     ngx_uint_t     semaphore;
  30.     sem_t          sem;
  31. #endif
  32. #else
  33.     ngx_fd_t       fd;
  34.     u_char        *name;
  35. #endif
  36.     ngx_uint_t     spin;
  37. ‌} ngx_shmtx_t;


  40. ngx_int_t ngx_shmtx_create(ngx_shmtx_t *mtx, ngx_shmtx_sh_t *addr,
  41.     u_char *name);
  42. void ngx_shmtx_destroy(ngx_shmtx_t *mtx);
  43. ngx_uint_t ngx_shmtx_trylock(ngx_shmtx_t *mtx);
  44. void ngx_shmtx_lock(ngx_shmtx_t *mtx);
  45. void ngx_shmtx_unlock(ngx_shmtx_t *mtx);
  46. ngx_uint_t ngx_shmtx_force_unlock(ngx_shmtx_t *mtx, ngx_pid_t pid);


  49. #endif /* _NGX_SHMTX_H_INCLUDED_ */

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