static APIRET CreateSem(void)
{
#ifdef __os2_16__
char SemName[32];
sprintf(SemName, "\\SEM\\jed\\%u", getpid());
return ( DosCreateSem (0, &Hmtx, SemName) );
#else
return ( DosCreateMutexSem (NULL, &Hmtx, 0, 0) );
#endif
}
/*
* netinitancbs - init async ncbs
*
* inits semaphores etc in async ncb pool
*
*/
void
netinitancbs(void)
{
register struct ncb_a *ncbp; /* pointer to each ncb */
register int i; /* temp index */
#ifndef NT
int rc; /* return code */
union farptr global_seg; /* pointer to GDT info segment */
union farptr local_seg; /* pointer to LDT info segment */
char NEAR *sem_mask = "\\SEM\\NCB%05x.%03x";
#include "..\h\packon.h"
struct ldt_info_seg
{
int ldti_pid; /* current process id */
int ldti_ppid; /* parrent process id */
int ldti_priority; /* priority of current thread */
int ldti_thread; /* current thread id */
int ldti_screengrp; /* current screengroup */
int ldti_subscreengrp; /* current subscreengroup */
int ldti_forground; /* current process is in forground */
};
#include "..\h\packoff.h"
struct ldt_info_seg FAR *ldt_info_p;
char sem_name[20];
lockncbpool();
if (async_ncbs_inited)
{
unlockncbpool();
return;
}
rc = DosGetInfoSeg(
(PSEL) &global_seg.lp.lp_seg, /* addr to return segment value */
(PSEL) &local_seg.lp.lp_seg); /* addr to return segment value */
if (rc)
{
fprintf(stderr, "GETINFOSEG failed (%d)\n", rc);
exit ( rc );
}
local_seg.lp.lp_offset = 0;
ldt_info_p = (struct ldt_info_seg FAR *) local_seg.fp;
for (ncbp=&asyncncbs[0], i=0; ncbp < &asyncncbs[num_async_ncbs]; ncbp++, i++)
{
ncbp->ncb_status = NCB_FREE; /* starts out free */
sprintf(sem_name, sem_mask, ldt_info_p->ldti_pid, i);
#ifdef DEBUG1
printf("creating semaphore %s\n", sem_name);
#endif
rc = DosCreateSem(
(unsigned int) 1, /* non exclusive ownership of semaphore */
(PHSYSSEM) &ncbp->ncb_sem, /* place to return sem handle */
(char FAR *) &sem_name[0]); /* name for semaphore */
if (rc)
{
fprintf(stderr, "CREATESEM \"%s\" failed (%d)\n", sem_name, rc);
exit ( rc );
}
ncbp->ncb_sem_a = ncbp->ncb_sem; /* save away semaphore */
ncbp->ncb_seqno = 0L; /* none as yet */
#ifdef DEBUG1
printf("ncbp is 0x%x, semaphore handle is 0x%lx, saved handle is 0x%lx\n",
ncbp, ncbp->ncb_sem, ncbp->ncb_sem_a);
#endif
}
async_ncbs_inited = 1;
unlockncbpool();
#else
//
// NT Pool Initialization - Create pool locking semaphore
//
if (NULL == (async_ncb_pool_sem = CreateSemaphore ( NULL, 1, 1, NULL ) ) ) {
fprintf(stderr, "Semaphore create failed (%d)\n", GetLastError());
exit (GetLastError());
}
lockncbpool();
if (async_ncbs_inited) {
unlockncbpool();
return;
}
//
// Create an event for each NCB
//
for (ncbp=&asyncncbs[0], i=0; ncbp < &asyncncbs[num_async_ncbs]; ncbp++, i++) {
ncbp->ncb_status = NCB_FREE; /* starts out free */
if ( NULL == (ncbp->ncb_event = CreateEvent ( NULL,
TRUE, // manual reset
FALSE, // initially not signalled
NULL ) ) ) {
fprintf(stderr, "Create NCB event failed (%d)\n", GetLastError ());
exit ( GetLastError() );
}
ncbp->ncb_sem_a = ncbp->ncb_event; /* save away event handle */
ncbp->ncb_seqno = 0L; /* none as yet */
}
async_ncbs_inited = 1;
unlockncbpool();
#endif
}
