sunrpc/rpc_thread.c

   1 #include <stdio.h>
   2 #include <rpc/rpc.h>
   3 #include <assert.h>
   4
   5 #include <libc-lock.h>
   6 #include <libc-tsd.h>
   7 #include <shlib-compat.h>
   8 #include <libc-symbols.h>
   9
  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 static __thread struct rpc_thread_variables *thread_rpc_vars
  14         attribute_tls_model_ie;
  15
  16 /*
  17  * Task-variable destructor
  18  */
  19 void
  20 __rpc_thread_destroy (void)
  21 {
  22         struct rpc_thread_variables *tvp = thread_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                 thread_rpc_vars = NULL;
  38         }
  39 }
  40 text_set_element (__libc_subfreeres, __rpc_thread_destroy);
  41
  42 /*
  43  * Initialize RPC multi-threaded operation
  44  */
  45 static void
  46 rpc_thread_multi (void)
  47 {
  48   thread_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 = thread_rpc_vars;
  57
  58         if (tvp == NULL) {
  59                 __libc_once (once, rpc_thread_multi);
  60                 tvp = thread_rpc_vars;
  61                 if (tvp == NULL) {
  62                         tvp = calloc (1, sizeof *tvp);
  63                         if (tvp != NULL)
  64                                 thread_rpc_vars = tvp;
  65                 }
  66         }
  67         return tvp;
  68 }
  69
  70
  71 /* Global variables If we're single-threaded, or if this is the first
  72    thread using the variable, use the existing global variable.  This
  73    provides backwards compatibility for existing applications which
  74    dynamically link against this code.  */
  75 #undef svc_fdset
  76 #undef rpc_createerr
  77 #undef svc_pollfd
  78 #undef svc_max_pollfd
  79
  80 fd_set *
  81 __rpc_thread_svc_fdset (void)
  82 {
  83         struct rpc_thread_variables *tvp;
  84
  85         tvp = __rpc_thread_variables ();
  86         if (tvp == &__libc_tsd_RPC_VARS_mem)
  87                 return &svc_fdset;
  88         return &tvp->svc_fdset_s;
  89 }
  90 libc_hidden_nolink_sunrpc (__rpc_thread_svc_fdset, GLIBC_2_2_3)
  91
  92 struct rpc_createerr *
  93 __rpc_thread_createerr (void)
  94 {
  95         struct rpc_thread_variables *tvp;
  96
  97         tvp = __rpc_thread_variables ();
  98         if (tvp == &__libc_tsd_RPC_VARS_mem)
  99                 return &rpc_createerr;
 100         return &tvp->rpc_createerr_s;
 101 }
 102 libc_hidden_nolink_sunrpc (__rpc_thread_createerr, GLIBC_2_2_3)
 103
 104 struct pollfd **
 105 __rpc_thread_svc_pollfd (void)
 106 {
 107         struct rpc_thread_variables *tvp;
 108
 109         tvp = __rpc_thread_variables ();
 110         if (tvp == &__libc_tsd_RPC_VARS_mem)
 111                 return &svc_pollfd;
 112         return &tvp->svc_pollfd_s;
 113 }
 114 #ifdef EXPORT_RPC_SYMBOLS
 115 libc_hidden_def (__rpc_thread_svc_pollfd)
 116 #else
 117 libc_hidden_nolink_sunrpc (__rpc_thread_svc_pollfd, GLIBC_2_2_3)
 118 #endif
 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 #ifdef EXPORT_RPC_SYMBOLS
 131 libc_hidden_def (__rpc_thread_svc_max_pollfd)
 132 #else
 133 libc_hidden_nolink_sunrpc (__rpc_thread_svc_max_pollfd, GLIBC_2_2_3)
 134 #endif