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 __attribute__ ((section ("__libc_thread_freeres_fn")))
  19 __rpc_thread_destroy (void)
  20 {
  21         struct rpc_thread_variables *tvp = __libc_tsd_get (RPC_VARS);
  22
  23         if (tvp != NULL) {
  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                 if (tvp != &__libc_tsd_RPC_VARS_mem)
  33                         free (tvp);
  34                 __libc_tsd_set (RPC_VARS, NULL);
  35         }
  36 }
  37 #ifdef _LIBC_REENTRANT
  38 text_set_element (__libc_thread_subfreeres, __rpc_thread_destroy);
  39 #endif
  40 text_set_element (__libc_subfreeres, __rpc_thread_destroy);
  41
  42
  43 /*
  44  * Initialize RPC multi-threaded operation
  45  */
  46 static void
  47 rpc_thread_multi (void)
  48 {
  49   __libc_tsd_set (RPC_VARS, &__libc_tsd_RPC_VARS_mem);
  50 }
  51
  52
  53 struct rpc_thread_variables *
  54 __rpc_thread_variables (void)
  55 {
  56         __libc_once_define (static, once);
  57         struct rpc_thread_variables *tvp;
  58
  59         tvp = __libc_tsd_get (RPC_VARS);
  60         if (tvp == NULL) {
  61                 __libc_once (once, rpc_thread_multi);
  62                 tvp = __libc_tsd_get (RPC_VARS);
  63                 if (tvp == NULL) {
  64                         tvp = calloc (1, sizeof *tvp);
  65                         if (tvp != NULL)
  66                                 __libc_tsd_set (RPC_VARS, tvp);
  67                         else
  68                                 tvp = __libc_tsd_get (RPC_VARS);
  69                 }
  70         }
  71         return tvp;
  72 }
  73
  74
  75 /* Global variables If we're single-threaded, or if this is the first
  76    thread using the variable, use the existing global variable.  This
  77    provides backwards compatability for existing applications which
  78    dynamically link against this code.  */
  79 #undef svc_fdset
  80 #undef rpc_createerr
  81 #undef svc_pollfd
  82 #undef svc_max_pollfd
  83
  84 fd_set *
  85 __rpc_thread_svc_fdset (void)
  86 {
  87         struct rpc_thread_variables *tvp;
  88
  89         tvp = __rpc_thread_variables ();
  90         if (tvp == &__libc_tsd_RPC_VARS_mem)
  91                 return &svc_fdset;
  92         return &tvp->svc_fdset_s;
  93 }
  94 libc_hidden_def (__rpc_thread_svc_fdset)
  95
  96 struct rpc_createerr *
  97 __rpc_thread_createerr (void)
  98 {
  99         struct rpc_thread_variables *tvp;
 100
 101         tvp = __rpc_thread_variables ();
 102         if (tvp == &__libc_tsd_RPC_VARS_mem)
 103                 return &rpc_createerr;
 104         return &tvp->rpc_createerr_s;
 105 }
 106 libc_hidden_def (__rpc_thread_createerr)
 107
 108 struct pollfd **
 109 __rpc_thread_svc_pollfd (void)
 110 {
 111         struct rpc_thread_variables *tvp;
 112
 113         tvp = __rpc_thread_variables ();
 114         if (tvp == &__libc_tsd_RPC_VARS_mem)
 115                 return &svc_pollfd;
 116         return &tvp->svc_pollfd_s;
 117 }
 118 libc_hidden_def (__rpc_thread_svc_pollfd)
 119
 120 int *
 121 __rpc_thread_svc_max_pollfd (void)
 122 {
 123         struct rpc_thread_variables *tvp;
 124
 125         tvp = __rpc_thread_variables ();
 126         if (tvp == &__libc_tsd_RPC_VARS_mem)
 127                 return &svc_max_pollfd;
 128         return &tvp->svc_max_pollfd_s;
 129 }
 130 libc_hidden_def (__rpc_thread_svc_max_pollfd)
 131
 132 #endif /* _RPC_THREAD_SAFE_ */