/*
* This function should be called before using any of sychronization
* primitives below.
* Return: 1 = success, 0 = error;
*/
int init_sync( void )
{
#ifdef HAVE_SGI_SPROC
ArenaName = tempnam( "", "LOCK" );
if (!ArenaName) {
fprintf(stderr,"Unable to allocate arena.\n");
return 0;
}
/*
* Increase CONF_INITUSERS to 20 to avoid the error:
* New process pid 20029 could not join I/O arena:No space left on device
* Need to raise CONF_INITUSERS? (usconfig(3P))
*/
usconfig( CONF_INITUSERS, 20 );
/*
* This options causes the temporary lock file to be unlinked automatically.
*/
usconfig( CONF_ARENATYPE, US_SHAREDONLY );
/*
* Initialize the shared arena
*/
Arena = usinit(ArenaName);
if (!Arena) {
fprintf(stderr,"Unable to allocate arena.\n");
return 0;
}
#endif
ALLOC_LOCK( RWlock );
return 1;
}
void init_queue( void )
{
ALLOC_LOCK( qlock );
ALLOC_SEM( qnotempty, 0 );
qsize = 0;
qhead = qtail = 0;
qwaiters = 0;
}
/********************************************************************
* @创建人 :揭成
* @功能:释放内存块
*
* @输入:pMmem pmem
*
*@输出: 申请的内存指针
********************************************************************/
void GUI_free( void*pmem )
{
uint8_t offset = 0;
if ( pmem < ( void* )GUI_malloc_mem[0]
|| pmem > ( void* )GUI_malloc_mem[GUI_MEM_NBLK-1] )
return;
ALLOC_LOCK();
offset = (( uint8_t* )pmem - ( uint8_t* )GUI_malloc_mem )
/ GUI_BLOCK_SIZE; /*计算出偏移*/
GUI_mem_ctl[offset] = GUI_MEM_IS_IDLE; /*释放主占块*/
offset++;
while ( GUI_mem_ctl[offset] == GUI_MEM_IS_SOCCUPY )
{
GUI_mem_ctl[offset] = GUI_MEM_IS_IDLE; /*释放附属块*/
offset++;
}
ALLOC_UNLOCK();
return;
}
/********************************************************************
* @创建人 :揭成
* @功能:申请nblk个内存块
*
* @输入:pMmem pmem
*
*@输出: 申请的内存指针
********************************************************************/
void*GUI_malloc( uint32_t mem_size )
{
char*ptemp;
uint8_t offset;
uint8_t nblk;
mem_size += 1;
nblk = MSIZE_TO_NBLK( mem_size );
if ( !mem_size ) return PNULL;
ALLOC_LOCK();
if ( nblk <= GUI_MEM_NBLK ) /*判断NBLK的合法性*/
{
GUI_memset( GUI_mem_pdest,
GUI_MEM_IS_IDLE,
sizeof( char )*nblk ); /*将要找的内存合成字符串*/
GUI_mem_pdest[nblk] = PNULL; /*为字符串补一个结尾*/
ptemp = GUI_string_locate(
( char* )( GUI_mem_ctl ),
( char* )GUI_mem_pdest ); /*定位字符串*/
if ( ptemp != PNULL )
{
*ptemp = GUI_MEM_IS_MOCCUPY; /*设置优先级对应的PRO为主占*/
GUI_memset(( uint8_t* )( ptemp + 1 ),
GUI_MEM_IS_SOCCUPY,
( nblk - 1 ) ); /*其余为附属*/
offset = ( uint8_t* )ptemp -
( uint8_t* )( GUI_mem_ctl ); /*计算出偏移*/
ptemp = ( char* )GUI_malloc_mem +
(( GUI_BLOCK_SIZE ) * offset ); /*计算出空闲内存块指针头*/
ALLOC_UNLOCK();
if ((( long )ptemp % 2 ) == 0 ) return ptemp; /*返回任务申请到的指针*/
else return (( char* )ptemp + 1 );
}
}
nblk = GUI_MEM_NBLK;
ALLOC_UNLOCK();
return PNULL;
}
int init_record_cache( Irregular_Context itx, int maxbytes, float *ratio )
{
int i, j;
int numfloatvars, numcharvars, numberofchars;
int recordsize;
int soundingsize;
int totalnumrecs;
/* dyamically allocate memory for RecordTable since */
/* MAXTIMES*MAXRECS is way too large */
for (i = 0; i < itx->NumTimes; i++){
itx->RecordTable[i] = (struct irreg_rec *) calloc(itx->NumRecs[i], sizeof(struct irreg_rec));
}
ALLOC_LOCK(itx->Mutex);
/*********************************/
/* figure out size of one record */
/*********************************/
numfloatvars = 0;
numcharvars = 0;
numberofchars = 0;
soundingsize = 0;
for (i = 0; i < itx->NumVars; i++){
if (itx->Variable[i]->VarType == NUMERICAL_VAR_1D ){
numfloatvars++;
}
else if (itx->Variable[i]->VarType == NUMERICAL_VAR_2D ){
soundingsize += itx->Levels;
}
else if (itx->Variable[i]->VarType == CHARACTER_VAR){
numberofchars += itx->Variable[i]->CharVarLength;
numcharvars++;
}
else{
printf("Error in init_record_cache\n");
return -1;
}
}
if (itx->Type == SOUNDING){
recordsize = numfloatvars * sizeof(double) +
soundingsize * sizeof(double) +
itx->Levels * sizeof(float) +
numberofchars * sizeof(char);
}
else{
recordsize = numfloatvars * sizeof(double) +
soundingsize * sizeof(double) +
numberofchars * sizeof(char);
}
itx->CharArrayLength = numberofchars;
/****************************************************/
/* figure out how many records can be put in memory */
/****************************************************/
itx->MaxCachedRecs = (int) maxbytes / recordsize;
/**********************/
/* get total num recs */
/**********************/
totalnumrecs = 0;
for (i = 0; i < itx->NumTimes; i++){
totalnumrecs += itx->NumRecs[i];
}
if (itx->MaxCachedRecs >= totalnumrecs){
/* all records can be cached */
itx->MaxCachedRecs = totalnumrecs;
printf("Reading all records\n");
*ratio = 1.0;
}
else{
*ratio = ((float) itx->MaxCachedRecs)
/ ((float) totalnumrecs);
}
itx->NumCachedRecs = 0;
printf("Cache size: %d records\n", itx->MaxCachedRecs);
/****************************/
/* allocate irregular cache */
/****************************/
itx->RecordCache = (struct cache_irreg_rec *) i_allocate( itx, itx->MaxCachedRecs
* sizeof(struct cache_irreg_rec) );
/************/
/* check it */
/************/
if (!itx->RecordCache){
printf("Error1: out of memory. Couldn't allocate cache space.\n");
return 0;
}
/******************************************************************/
/* allocate memory for RecGeoPosition, this simply contains the */
/* lat, lon, alt for all the records. This was removed from the */
/* cache_irreg_rec becuase if all the records can not fit into */
/* the cache, they will have to be loaded at some point in time */
/* into the cache in order to see whether or not to be used in a */
/* graphic, by loading all the lat, lon, and alts and keeping them*/
/* this will eliminate this problem and the record cache will be */
/* more effective */
/******************************************************************/
for (i = 0; i < itx->NumTimes; i++){
itx->RecGeoPosition[i] = (struct rec_geo_position *) i_allocate( itx,
itx->NumRecs[i] *
sizeof(struct rec_geo_position) );
if (!itx->RecGeoPosition[i]){
printf("Not enough memory to allocate for RecGeoPosition\n");
return 0;
}
}
itx->CacheClock = 1;
for (i=0;i<itx->MaxCachedRecs;i++){
/************************/
/* alloc DataType array */
/************************/
itx->RecordCache[i].DataType =
i_allocate( itx, itx->NumVars*sizeof(int));
/************/
/* check it */
/************/
if (!itx->RecordCache[i].DataType){
printf("Error3: out of memory. Couldn't allocate cache space.\n");
return 0;
}
/***************/
/* alloc Value */
/***************/
itx->RecordCache[i].Value =
i_allocate( itx, itx->NumVars*sizeof(double));
/************/
/* check it */
/************/
if (!itx->RecordCache[i].Value){
printf("Error4: out of memory. Couldn't allocate cache space.\n");
return 0;
}
/*************************/
/* alloc Sounding Values */
/*************************/
if (soundingsize){
itx->RecordCache[i].SoundingValue =
i_allocate( itx, soundingsize * sizeof(double));
/************/
/* check it */
/************/
if (!itx->RecordCache[i].SoundingValue){
printf("Error5: out of memory. Couldn't allocate cache space.\n");
return 0;
}
itx->RecordCache[i].SoundingLevel =
i_allocate( itx, itx->Levels * sizeof(float));
if(!itx->RecordCache[i].SoundingLevel){
printf("Error6: out of memory. Couldn't allocate cache space.\n");
return 0;
}
}
/***********************/
/* Alloc char var data */
/***********************/
itx->RecordCache[i].CharData =
i_allocate( itx, numberofchars*sizeof(char ));
/************/
/* check it */
/************/
if (!itx->RecordCache[i].CharData){
printf("Error7: out of memory. Couldn't allocate cache space.\n");
return 0;
}
itx->RecordCache[i].Locked = 0;
itx->RecordCache[i].Timestep = 0;
}
for (i=0; i<itx->NumTimes; i++){
for (j = 0; j < itx->NumRecs[i]; j++){
itx->RecordTable[i][j].CachePos = -1;
itx->RecordTable[i][j].DataType = NULL;
itx->RecordTable[i][j].Value = NULL;
itx->RecordTable[i][j].SoundingValue = NULL;
itx->RecordTable[i][j].SoundingLevel = NULL;
itx->RecordTable[i][j].CharData = NULL;
}
}
return 1;
}