gnu/dist/gdb6/gdb/osf-share/cma_init.h

   1 /*
   2  * (c) Copyright 1990-1996 OPEN SOFTWARE FOUNDATION, INC.
   3  * (c) Copyright 1990-1996 HEWLETT-PACKARD COMPANY
   4  * (c) Copyright 1990-1996 DIGITAL EQUIPMENT CORPORATION
   5  * (c) Copyright 1991, 1992 Siemens-Nixdorf Information Systems
   6  * To anyone who acknowledges that this file is provided "AS IS" without
   7  * any express or implied warranty: permission to use, copy, modify, and
   8  * distribute this file for any purpose is hereby granted without fee,
   9  * provided that the above copyright notices and this notice appears in
  10  * all source code copies, and that none of the names listed above be used
  11  * in advertising or publicity pertaining to distribution of the software
  12  * without specific, written prior permission.  None of these organizations
  13  * makes any representations about the suitability of this software for
  14  * any purpose.
  15  */
  16 /*
  17  *      Header file for CMA initialization
  18  */
  19
  20 #ifndef CMA_INIT
  21 #define CMA_INIT
  22
  23 /*
  24  *  INCLUDE FILES
  25  */
  26 #include <dce/cma_host.h>
  27 #include <cma_errors.h>
  28
  29 /*
  30  * CONSTANTS AND MACROS
  31  */
  32
  33 #define cma__c_env_maxattr      0
  34 #define cma__c_env_minattr      1
  35 #define cma__c_env_maxcond      2
  36 #define cma__c_env_mincond      3
  37 #define cma__c_env_maxmutex     4
  38 #define cma__c_env_minmutex     5
  39 #define cma__c_env_maxthread    6
  40 #define cma__c_env_minthread    7
  41 #define cma__c_env_maxcluster   8
  42 #define cma__c_env_mincluster   9
  43 #define cma__c_env_maxvp        10
  44 #define cma__c_env_multiplex    11
  45 #define cma__c_env_trace        12
  46 #define cma__c_env_trace_file   13
  47
  48 #define cma__c_env_count        13
  49
  50
  51 /*
  52  * cma__int_init
  53  *
  54  * Initialize the main body of CMA exactly once.
  55  *
  56  * We raise an exception if, for some odd reason, there are already threads
  57  * in the environment (e.g. kernel threads), and one of them is trying to
  58  * initialize CMA before the  first thread got all the way through the actual
  59  * initialization. This code maintains the invariants: "after successfully
  60  * calling CMA_INIT, you can call any CMA function", and  "CMA is actually
  61  * initialized at most once".
  62  */
  63 /*#ifndef _HP_LIBC_R */
  64
  65 #if  defined _HP_LIBC_R  ||(defined(SNI_SVR4) && !defined(CMA_INIT_NEEDED))
  66 # define cma__int_init()
  67 #else
  68 # define cma__int_init() { \
  69     if (!cma__tac_isset(&cma__g_init_started)) { \
  70         if (!cma__test_and_set (&cma__g_init_started)) { \
  71             cma__init_static (); \
  72             cma__test_and_set (&cma__g_init_done); \
  73             } \
  74         else if (!cma__tac_isset (&cma__g_init_done)) { \
  75             cma__error (cma_s_inialrpro); \
  76     }}}
  77 #endif
  78
  79 /*
  80  * TYPEDEFS
  81  */
  82
  83 typedef enum CMA__T_ENV_TYPE {
  84     cma__c_env_type_int,
  85     cma__c_env_type_file
  86     } cma__t_env_type;
  87
  88 typedef struct CMA__T_ENV {
  89     char                *name;          /* Name of environment variable */
  90     cma__t_env_type     type;           /* Type of variable */
  91     cma_t_integer       value;          /* Numeric value of the variable */
  92     } cma__t_env;
  93
  94 /*
  95  *  GLOBAL DATA
  96  */
  97
  98 extern cma__t_env               cma__g_env[cma__c_env_count];
  99 extern cma__t_atomic_bit        cma__g_init_started;
 100 extern cma__t_atomic_bit        cma__g_init_done;
 101 extern char                     *cma__g_version;
 102
 103 /*
 104  * INTERNAL INTERFACES
 105  */
 106
 107 extern void
 108 cma__init_static (void);        /* Initialize static data */
 109
 110 #if _CMA_OS_ != _CMA__VMS
 111 extern void cma__init_atfork (void);
 112 #endif
 113
 114 #endif