sunrpc/rpc_thread.c

   1 #include <stdio.h>
   2 #include <bits/libc-lock.h>
   3 #include <rpc/rpc.h>
   4 #include <assert.h>
   5
   6 #include <bits/libc-lock.h>
   7 #include <bits/libc-tsd.h>
   8
   9 #ifdef _RPC_THREAD_SAFE_
  10
  11 /* Variable used in non-threaded applications or for the first thread.  */
  12 static struct rpc_thread_variables __libc_tsd_RPC_VARS_mem;
  13 __libc_tsd_define (, RPC_VARS)
  14
  15 /*
  16  * Task-variable destructor
  17  */
  18 void
  19 __rpc_thread_destroy (void)
  20 {
  21         struct rpc_thread_variables *tvp = __libc_tsd_get (RPC_VARS);
  22
  23         if (tvp != NULL && tvp != &__libc_tsd_RPC_VARS_mem) {
  24                 __rpc_thread_svc_cleanup ();
  25                 __rpc_thread_clnt_cleanup ();
  26                 __rpc_thread_key_cleanup ();
  27                 free (tvp->clnt_perr_buf_s);
  28                 free (tvp->clntraw_private_s);
  29                 free (tvp->svcraw_private_s);
  30                 free (tvp->authdes_cache_s);
  31                 free (tvp->authdes_lru_s);
  32                 free (tvp);
  33         }
  34 }
  35
  36
  37 /*
  38  * Initialize RPC multi-threaded operation
  39  */
  40 static void
  41 rpc_thread_multi (void)
  42 {
  43   __libc_tsd_set (RPC_VARS, &__libc_tsd_RPC_VARS_mem);
  44 }
  45
  46
  47 struct rpc_thread_variables *
  48 __rpc_thread_variables (void)
  49 {
  50         __libc_once_define (static, once);
  51         struct rpc_thread_variables *tvp;
  52
  53         tvp = __libc_tsd_get (RPC_VARS);
  54         if (tvp == NULL) {
  55                 __libc_once (once, rpc_thread_multi);
  56                 tvp = __libc_tsd_get (RPC_VARS);
  57                 if (tvp == NULL) {
  58                         tvp = calloc (1, sizeof *tvp);
  59                         if (tvp != NULL)
  60                                 __libc_tsd_set (RPC_VARS, tvp);
  61                         else
  62                                 tvp = __libc_tsd_get (RPC_VARS);
  63                 }
  64         }
  65         return tvp;
  66 }
  67
  68
  69 /* Global variables If we're single-threaded, or if this is the first
  70    thread using the variable, use the existing global variable.  This
  71    provides backwards compatability for existing applications which
  72    dynamically link against this code.  */
  73 #undef svc_fdset
  74 #undef rpc_createerr
  75 #undef svc_pollfd
  76 #undef svc_max_pollfd
  77
  78 fd_set *
  79 __rpc_thread_svc_fdset (void)
  80 {
  81         struct rpc_thread_variables *tvp;
  82
  83         tvp = __rpc_thread_variables ();
  84         if (tvp == &__libc_tsd_RPC_VARS_mem)
  85                 return &svc_fdset;
  86         return &tvp->svc_fdset_s;
  87 }
  88 libc_hidden_def (__rpc_thread_svc_fdset)
  89
  90 struct rpc_createerr *
  91 __rpc_thread_createerr (void)
  92 {
  93         struct rpc_thread_variables *tvp;
  94
  95         tvp = __rpc_thread_variables ();
  96         if (tvp == &__libc_tsd_RPC_VARS_mem)
  97                 return &rpc_createerr;
  98         return &tvp->rpc_createerr_s;
  99 }
 100 libc_hidden_def (__rpc_thread_createerr)
 101
 102 struct pollfd **
 103 __rpc_thread_svc_pollfd (void)
 104 {
 105         struct rpc_thread_variables *tvp;
 106
 107         tvp = __rpc_thread_variables ();
 108         if (tvp == &__libc_tsd_RPC_VARS_mem)
 109                 return &svc_pollfd;
 110         return &tvp->svc_pollfd_s;
 111 }
 112 libc_hidden_def (__rpc_thread_svc_pollfd)
 113
 114 int *
 115 __rpc_thread_svc_max_pollfd (void)
 116 {
 117         struct rpc_thread_variables *tvp;
 118
 119         tvp = __rpc_thread_variables ();
 120         if (tvp == &__libc_tsd_RPC_VARS_mem)
 121                 return &svc_max_pollfd;
 122         return &tvp->svc_max_pollfd_s;
 123 }
 124 libc_hidden_def (__rpc_thread_svc_max_pollfd)
 125
 126 #endif /* _RPC_THREAD_SAFE_ */