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
  41 /*
  42  * Initialize RPC multi-threaded operation
  43  */
  44 static void
  45 rpc_thread_multi (void)
  46 {
  47   thread_rpc_vars = &__libc_tsd_RPC_VARS_mem;
  48 }
  49
  50
  51 struct rpc_thread_variables *
  52 __rpc_thread_variables (void)
  53 {
  54         __libc_once_define (static, once);
  55         struct rpc_thread_variables *tvp = thread_rpc_vars;
  56
  57         if (tvp == NULL) {
  58                 __libc_once (once, rpc_thread_multi);
  59                 tvp = thread_rpc_vars;
  60                 if (tvp == NULL) {
  61                         tvp = calloc (1, sizeof *tvp);
  62                         if (tvp != NULL)
  63                                 thread_rpc_vars = tvp;
  64                 }
  65         }
  66         return tvp;
  67 }
  68
  69
  70 /* Global variables If we're single-threaded, or if this is the first
  71    thread using the variable, use the existing global variable.  This
  72    provides backwards compatibility for existing applications which
  73    dynamically link against this code.  */
  74 #undef svc_fdset
  75 #undef rpc_createerr
  76 #undef svc_pollfd
  77 #undef svc_max_pollfd
  78
  79 fd_set *
  80 __rpc_thread_svc_fdset (void)
  81 {
  82         struct rpc_thread_variables *tvp;
  83
  84         tvp = __rpc_thread_variables ();
  85         if (tvp == &__libc_tsd_RPC_VARS_mem)
  86                 return &svc_fdset;
  87         return &tvp->svc_fdset_s;
  88 }
  89 libc_hidden_nolink_sunrpc (__rpc_thread_svc_fdset, GLIBC_2_2_3)
  90
  91 struct rpc_createerr *
  92 __rpc_thread_createerr (void)
  93 {
  94         struct rpc_thread_variables *tvp;
  95
  96         tvp = __rpc_thread_variables ();
  97         if (tvp == &__libc_tsd_RPC_VARS_mem)
  98                 return &rpc_createerr;
  99         return &tvp->rpc_createerr_s;
 100 }
 101 libc_hidden_nolink_sunrpc (__rpc_thread_createerr, GLIBC_2_2_3)
 102
 103 struct pollfd **
 104 __rpc_thread_svc_pollfd (void)
 105 {
 106         struct rpc_thread_variables *tvp;
 107
 108         tvp = __rpc_thread_variables ();
 109         if (tvp == &__libc_tsd_RPC_VARS_mem)
 110                 return &svc_pollfd;
 111         return &tvp->svc_pollfd_s;
 112 }
 113 #ifdef EXPORT_RPC_SYMBOLS
 114 libc_hidden_def (__rpc_thread_svc_pollfd)
 115 #else
 116 libc_hidden_nolink_sunrpc (__rpc_thread_svc_pollfd, GLIBC_2_2_3)
 117 #endif
 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 #ifdef EXPORT_RPC_SYMBOLS
 130 libc_hidden_def (__rpc_thread_svc_max_pollfd)
 131 #else
 132 libc_hidden_nolink_sunrpc (__rpc_thread_svc_max_pollfd, GLIBC_2_2_3)
 133 #endif