lib/librte_eal/windows/rte_thread.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2021 Mellanox Technologies, Ltd
   3  */
   4
   5 #include <rte_common.h>
   6 #include <rte_errno.h>
   7 #include <rte_thread.h>
   8 #include <rte_windows.h>
   9
  10 struct eal_tls_key {
  11         DWORD thread_index;
  12 };
  13
  14 int
  15 rte_thread_tls_key_create(rte_tls_key *key,
  16                 __rte_unused void (*destructor)(void *))
  17 {
  18         *key = malloc(sizeof(**key));
  19         if ((*key) == NULL) {
  20                 RTE_LOG(DEBUG, EAL, "Cannot allocate TLS key.\n");
  21                 return -1;
  22         }
  23         (*key)->thread_index = TlsAlloc();
  24         if ((*key)->thread_index == TLS_OUT_OF_INDEXES) {
  25                 RTE_LOG_WIN32_ERR("TlsAlloc()");
  26                 free(*key);
  27                 return -1;
  28         }
  29         return 0;
  30 }
  31
  32 int
  33 rte_thread_tls_key_delete(rte_tls_key key)
  34 {
  35         if (!key) {
  36                 RTE_LOG(DEBUG, EAL, "Invalid TLS key.\n");
  37                 return -1;
  38         }
  39         if (!TlsFree(key->thread_index)) {
  40                 RTE_LOG_WIN32_ERR("TlsFree()");
  41                 free(key);
  42                 return -1;
  43         }
  44         free(key);
  45         return 0;
  46 }
  47
  48 int
  49 rte_thread_tls_value_set(rte_tls_key key, const void *value)
  50 {
  51         char *p;
  52
  53         if (!key) {
  54                 RTE_LOG(DEBUG, EAL, "Invalid TLS key.\n");
  55                 return -1;
  56         }
  57         /* discard const qualifier */
  58         p = (char *) (uintptr_t) value;
  59         if (!TlsSetValue(key->thread_index, p)) {
  60                 RTE_LOG_WIN32_ERR("TlsSetValue()");
  61                 return -1;
  62         }
  63         return 0;
  64 }
  65
  66 void *
  67 rte_thread_tls_value_get(rte_tls_key key)
  68 {
  69         void *output;
  70
  71         if (!key) {
  72                 RTE_LOG(DEBUG, EAL, "Invalid TLS key.\n");
  73                 rte_errno = EINVAL;
  74                 return NULL;
  75         }
  76         output = TlsGetValue(key->thread_index);
  77         if (GetLastError() != ERROR_SUCCESS) {
  78                 RTE_LOG_WIN32_ERR("TlsGetValue()");
  79                 rte_errno = ENOEXEC;
  80                 return NULL;
  81         }
  82         return output;
  83 }