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