mono/utils/mono-tls.h

   1 /*
   2  * mono-tls.h: Low-level TLS support
   3  *
   4  * Author:
   5  *      Rodrigo Kumpera (kumpera@gmail.com)
   6  *
   7  * Copyright 2011 Novell, Inc (http://www.novell.com)
   8  * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
   9  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
  10  */
  11
  12 #ifndef __MONO_TLS_H__
  13 #define __MONO_TLS_H__
  14
  15 #include <config.h>
  16 #include <glib.h>
  17
  18 /* TLS entries used by the runtime */
  19 typedef enum {
  20         /* mono_thread_internal_current () */
  21         TLS_KEY_THREAD = 0,
  22         TLS_KEY_JIT_TLS = 1,
  23         /* mono_domain_get () */
  24         TLS_KEY_DOMAIN = 2,
  25         TLS_KEY_LMF = 3,
  26         TLS_KEY_SGEN_THREAD_INFO = 4,
  27         TLS_KEY_LMF_ADDR = 5,
  28         TLS_KEY_NUM = 6
  29 } MonoTlsKey;
  30
  31 #ifdef HAVE_KW_THREAD
  32 #define USE_KW_THREAD
  33 #endif
  34
  35 #if defined(USE_KW_THREAD)
  36 #define HAVE_GET_TLS_ADDR
  37 #elif defined(TARGET_MACH) && (defined(TARGET_X86) || defined(TARGET_AMD64))
  38 /* mono_mach_get_tls_address_from_thread is untested for arm/arm64 */
  39 #define HAVE_GET_TLS_ADDR
  40 #endif
  41
  42 #ifdef HOST_WIN32
  43
  44 #include <windows.h>
  45
  46 #define MonoNativeTlsKey DWORD
  47 #define mono_native_tls_alloc(key,destructor) ((*(key) = TlsAlloc ()) != TLS_OUT_OF_INDEXES && destructor == NULL)
  48 #define mono_native_tls_free TlsFree
  49 #define mono_native_tls_set_value TlsSetValue
  50 #define mono_native_tls_get_value TlsGetValue
  51
  52 #else
  53
  54 #include <pthread.h>
  55
  56 #define MonoNativeTlsKey pthread_key_t
  57 #define mono_native_tls_get_value pthread_getspecific
  58
  59 static inline int
  60 mono_native_tls_alloc (MonoNativeTlsKey *key, void *destructor)
  61 {
  62         return pthread_key_create (key, (void (*)(void*)) destructor) == 0;
  63 }
  64
  65 static inline void
  66 mono_native_tls_free (MonoNativeTlsKey key)
  67 {
  68         pthread_key_delete (key);
  69 }
  70
  71 static inline int
  72 mono_native_tls_set_value (MonoNativeTlsKey key, gpointer value)
  73 {
  74         return !pthread_setspecific (key, value);
  75 }
  76
  77 #endif /* HOST_WIN32 */
  78
  79 void mono_tls_init_gc_keys (void);
  80 void mono_tls_init_runtime_keys (void);
  81 void mono_tls_free_keys (void);
  82 gint32 mono_tls_get_tls_offset (MonoTlsKey key);
  83 gpointer mono_tls_get_tls_getter (MonoTlsKey key, gboolean name);
  84 gpointer mono_tls_get_tls_setter (MonoTlsKey key, gboolean name);
  85 gpointer mono_tls_get_tls_addr (MonoTlsKey key);
  86
  87 gpointer mono_tls_get_thread (void);
  88 gpointer mono_tls_get_jit_tls (void);
  89 gpointer mono_tls_get_domain (void);
  90 gpointer mono_tls_get_lmf (void);
  91 gpointer mono_tls_get_sgen_thread_info (void);
  92 gpointer mono_tls_get_lmf_addr (void);
  93
  94 void mono_tls_set_thread (gpointer value);
  95 void mono_tls_set_jit_tls (gpointer value);
  96 void mono_tls_set_domain (gpointer value);
  97 void mono_tls_set_lmf (gpointer value);
  98 void mono_tls_set_sgen_thread_info (gpointer value);
  99 void mono_tls_set_lmf_addr (gpointer value);
 100
 101 #endif /* __MONO_TLS_H__ */