sunrpc/rpc_thread.c

   1 #include <stdio.h>
   2 #include <libc-lock.h>
   3 #include <rpc/rpc.h>
   4 #include <assert.h>
   5
   6 #include <libc-lock.h>
   7 #include <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 (, struct rpc_thread_variables *, 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
  22           = __libc_tsd_get (struct rpc_thread_variables *, RPC_VARS);
  23
  24         if (tvp != NULL) {
  25                 __rpc_thread_svc_cleanup ();
  26                 __rpc_thread_clnt_cleanup ();
  27                 __rpc_thread_key_cleanup ();
  28                 free (tvp->clnt_perr_buf_s);
  29                 free (tvp->clntraw_private_s);
  30                 free (tvp->svcraw_private_s);
  31                 free (tvp->authdes_cache_s);
  32                 free (tvp->authdes_lru_s);
  33                 free (tvp->svc_xports_s);
  34                 free (tvp->svc_pollfd_s);
  35                 if (tvp != &__libc_tsd_RPC_VARS_mem)
  36                         free (tvp);
  37                 __libc_tsd_set (struct rpc_thread_variables *, RPC_VARS, NULL);
  38         }
  39 }
  40 #ifdef _LIBC_REENTRANT
  41 text_set_element (__libc_thread_subfreeres, __rpc_thread_destroy);
  42 #endif
  43 text_set_element (__libc_subfreeres, __rpc_thread_destroy);
  44
  45
  46 /*
  47  * Initialize RPC multi-threaded operation
  48  */
  49 static void
  50 rpc_thread_multi (void)
  51 {
  52   __libc_tsd_set (struct rpc_thread_variables *, RPC_VARS,
  53                   &__libc_tsd_RPC_VARS_mem);
  54 }
  55
  56
  57 struct rpc_thread_variables *
  58 __rpc_thread_variables (void)
  59 {
  60         __libc_once_define (static, once);
  61         struct rpc_thread_variables *tvp;
  62
  63         tvp = __libc_tsd_get (struct rpc_thread_variables *, RPC_VARS);
  64         if (tvp == NULL) {
  65                 __libc_once (once, rpc_thread_multi);
  66                 tvp = __libc_tsd_get (struct rpc_thread_variables *, RPC_VARS);
  67                 if (tvp == NULL) {
  68                         tvp = calloc (1, sizeof *tvp);
  69                         if (tvp != NULL)
  70                                 __libc_tsd_set (struct rpc_thread_variables *,
  71                                                 RPC_VARS, tvp);
  72                         else
  73                                 tvp = __libc_tsd_get (struct rpc_thread_variables *,
  74                                                       RPC_VARS);
  75                 }
  76         }
  77         return tvp;
  78 }
  79
  80
  81 /* Global variables If we're single-threaded, or if this is the first
  82    thread using the variable, use the existing global variable.  This
  83    provides backwards compatibility for existing applications which
  84    dynamically link against this code.  */
  85 #undef svc_fdset
  86 #undef rpc_createerr
  87 #undef svc_pollfd
  88 #undef svc_max_pollfd
  89
  90 fd_set *
  91 __rpc_thread_svc_fdset (void)
  92 {
  93         struct rpc_thread_variables *tvp;
  94
  95         tvp = __rpc_thread_variables ();
  96         if (tvp == &__libc_tsd_RPC_VARS_mem)
  97                 return &svc_fdset;
  98         return &tvp->svc_fdset_s;
  99 }
 100 libc_hidden_nolink_sunrpc (__rpc_thread_svc_fdset, GLIBC_2_2_3)
 101
 102 struct rpc_createerr *
 103 __rpc_thread_createerr (void)
 104 {
 105         struct rpc_thread_variables *tvp;
 106
 107         tvp = __rpc_thread_variables ();
 108         if (tvp == &__libc_tsd_RPC_VARS_mem)
 109                 return &rpc_createerr;
 110         return &tvp->rpc_createerr_s;
 111 }
 112 libc_hidden_nolink_sunrpc (__rpc_thread_createerr, GLIBC_2_2_3)
 113
 114 struct pollfd **
 115 __rpc_thread_svc_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_pollfd;
 122         return &tvp->svc_pollfd_s;
 123 }
 124 #ifdef EXPORT_RPC_SYMBOLS
 125 libc_hidden_def (__rpc_thread_svc_pollfd)
 126 #else
 127 libc_hidden_nolink_sunrpc (__rpc_thread_svc_pollfd, GLIBC_2_2_3)
 128 #endif
 129
 130 int *
 131 __rpc_thread_svc_max_pollfd (void)
 132 {
 133         struct rpc_thread_variables *tvp;
 134
 135         tvp = __rpc_thread_variables ();
 136         if (tvp == &__libc_tsd_RPC_VARS_mem)
 137                 return &svc_max_pollfd;
 138         return &tvp->svc_max_pollfd_s;
 139 }
 140 #ifdef EXPORT_RPC_SYMBOLS
 141 libc_hidden_def (__rpc_thread_svc_max_pollfd)
 142 #else
 143 libc_hidden_nolink_sunrpc (__rpc_thread_svc_max_pollfd, GLIBC_2_2_3)
 144 #endif
 145
 146 #endif /* _RPC_THREAD_SAFE_ */