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/* This is the file to support single-threading.
* We initialize the global data structure and the global access variable.
*/
#include "rexx.h"
#include <string.h>
int __regina_tsd_initialized = 0;
tsd_t __regina_tsd = {0,}; /* Be sure the var is initialized here */
/* Lowest level memory allocation function for normal circumstances. */
static void *MTMalloc(const tsd_t *TSD,size_t size)
{
TSD = TSD; /* keep compiler happy */
return(malloc(size));
}
/* Lowest level memory deallocation function for normal circumstances. */
static void MTFree(const tsd_t *TSD,void *chunk)
{
TSD = TSD; /* keep compiler happy */
free(chunk);
}
/* Lowest level exit handler. Use this indirection to prevent errors. */
static void MTExit(int code)
{
exit(code);
}
tsd_t *ReginaInitializeProcess(void)
{
int OK;
if (__regina_tsd_initialized)
return(&__regina_tsd);
__regina_tsd_initialized = 1;
/* Set up the current (single) tsd_t:*/
/* Default all values to zero */
memset(&__regina_tsd,0,sizeof(__regina_tsd));
__regina_tsd.MTMalloc = MTMalloc;
__regina_tsd.MTFree = MTFree;
__regina_tsd.MTExit = MTExit;
OK = init_memory(&__regina_tsd); /* Initialize the memory module FIRST*/
/* Without the initial memory we don't have ANY chance! */
if (!OK)
return(NULL);
OK |= init_vars(&__regina_tsd); /* Initialize the variable module */
OK |= init_stacks(&__regina_tsd); /* Initialize the stack module */
OK |= init_filetable(&__regina_tsd); /* Initialize the files module */
OK |= init_math(&__regina_tsd); /* Initialize the math module */
OK |= init_spec_vars(&__regina_tsd); /* Initialize the interprt module */
OK |= init_tracing(&__regina_tsd); /* Initialize the tracing module */
OK |= init_builtin(&__regina_tsd); /* Initialize the builtin module */
OK |= init_client(&__regina_tsd); /* Initialize the client module */
OK |= init_library(&__regina_tsd); /* Initialize the library module */
OK |= init_rexxsaa(&__regina_tsd); /* Initialize the rexxsaa module */
OK |= init_shell(&__regina_tsd); /* Initialize the shell module */
OK |= init_envir(&__regina_tsd); /* Initialize the envir module */
OK |= init_expr(&__regina_tsd); /* Initialize the expr module */
#ifdef VMS
OK |= init_vms(&__regina_tsd); /* Initialize the vmscmd module */
OK |= init_vmf(&__regina_tsd); /* Initialize the vmsfuncs module */
#endif
__regina_tsd.loopcnt = 1; /* stupid r2perl-module */
__regina_tsd.traceparse = -1;
__regina_tsd.thread_id = 1;
if (!OK)
exiterror( ERR_STORAGE_EXHAUSTED, 0 ) ;
return(&__regina_tsd);
}
#ifdef TRACK_TSD_USAGE
/* We may want to check the counts of calls to __regina_get_tsd() which may do
* MUCH work on different platforms. We do some not optimizable work here.
* If you really wanna track down all calls to figure out WHERE to
* optimize try under a GNU friendly system:
* 1) In Makefile: Add "-pg -a" to the variable called "CFLAGS".
* 2) "make rexx" (Other targets might not work)
* 3) "./rexx whatyoulike.rexx"
* 4) "gprof rexx >usage.lst"
* 5) look at usage.lst for occurances of "WorkHeavy".
*/
volatile int __regina_Calls = 300; /* factor to get a "feel" for multithreading */
volatile int __regina_Point = 1;
void __regina_Nop(void)
{
__regina_Point = 2;
}
/* WorkHeavy does some work and returns the correct thread-specific data. */
tsd_t *__regina_WorkHeavy(void)
{
int todo = __regina_Calls;
while (todo--)
__regina_Nop();
return(&__regina_tsd);
}
#endif
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