src/mapi/mapi/u_current.h

   1 #ifndef _U_CURRENT_H_
   2 #define _U_CURRENT_H_
   3
   4 #include "u_compiler.h"
   5
   6 #ifdef MAPI_GLAPI_CURRENT
   7 #define GLAPI_EXPORT PUBLIC
   8 #else
   9 #define GLAPI_EXPORT
  10 #endif
  11
  12 /*
  13  * Unlike other utility functions, we need to keep the old names (_glapi_*) for
  14  * ABI compatibility.  The desired functions are wrappers to the old ones.
  15  */
  16
  17 struct _glapi_table;
  18
  19 #ifdef GLX_USE_TLS
  20
  21 GLAPI_EXPORT extern __thread struct _glapi_table *_glapi_tls_Dispatch
  22     __attribute__((tls_model("initial-exec")));
  23
  24 GLAPI_EXPORT extern __thread void *_glapi_tls_Context
  25     __attribute__((tls_model("initial-exec")));
  26
  27 GLAPI_EXPORT extern const struct _glapi_table *_glapi_Dispatch;
  28 GLAPI_EXPORT extern const void *_glapi_Context;
  29
  30 #else /* GLX_USE_TLS */
  31
  32 GLAPI_EXPORT extern struct _glapi_table *_glapi_Dispatch;
  33 GLAPI_EXPORT extern void *_glapi_Context;
  34
  35 #endif /* GLX_USE_TLS */
  36
  37 GLAPI_EXPORT void
  38 _glapi_check_multithread(void);
  39
  40 GLAPI_EXPORT void
  41 _glapi_set_context(void *context);
  42
  43 GLAPI_EXPORT void *
  44 _glapi_get_context(void);
  45
  46 GLAPI_EXPORT void
  47 _glapi_set_dispatch(struct _glapi_table *dispatch);
  48
  49 GLAPI_EXPORT struct _glapi_table *
  50 _glapi_get_dispatch(void);
  51
  52 void
  53 _glapi_destroy_multithread(void);
  54
  55
  56 struct mapi_table;
  57
  58 static INLINE void
  59 u_current_set(const struct mapi_table *tbl)
  60 {
  61    _glapi_check_multithread();
  62    _glapi_set_dispatch((struct _glapi_table *) tbl);
  63 }
  64
  65 static INLINE const struct mapi_table *
  66 u_current_get(void)
  67 {
  68 #ifdef GLX_USE_TLS
  69    return (const struct mapi_table *) _glapi_tls_Dispatch;
  70 #else
  71    return (const struct mapi_table *) (likely(_glapi_Dispatch) ?
  72       _glapi_Dispatch : _glapi_get_dispatch());
  73 #endif
  74 }
  75
  76 static INLINE void
  77 u_current_set_user(void *ptr)
  78 {
  79    _glapi_check_multithread();
  80    _glapi_set_context(ptr);
  81 }
  82
  83 static INLINE void *
  84 u_current_get_user(void)
  85 {
  86 #ifdef GLX_USE_TLS
  87    return _glapi_tls_Context;
  88 #else
  89    return likely(_glapi_Context) ? _glapi_Context : _glapi_get_context();
  90 #endif
  91 }
  92
  93 #endif /* GLX_USE_TLS */