cpus.h

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#ifndef PAPI_CPUS_H
#define PAPI_CPUS_H

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

typedef struct _CpuInfo
{
    unsigned int cpu_num;
    struct _CpuInfo *next;
    hwd_context_t **context;
    EventSetInfo_t **running_eventset;
    EventSetInfo_t *from_esi;          /* ESI used for last update this control state */
} CpuInfo_t;

/* The list of cpus, gets built as user apps set the cpu papi option on an event set */
extern volatile CpuInfo_t *_papi_hwi_cpu_head;

int _papi_hwi_initialize_cpu( CpuInfo_t ** dest, unsigned int cpu_num );
int _papi_hwi_shutdown_cpu( CpuInfo_t * cpu );

inline_static CpuInfo_t *
_papi_hwi_lookup_cpu( unsigned int cpu_num )
{
    THRDBG("Entry:\n");
    CpuInfo_t *tmp;

    _papi_hwi_lock( CPUS_LOCK );

    tmp = ( CpuInfo_t * ) _papi_hwi_cpu_head;
    while ( tmp != NULL ) {
        THRDBG( "Examining cpu 0x%x at %p\n", tmp->cpu_num, tmp );
        if ( tmp->cpu_num == cpu_num )
            break;
        tmp = tmp->next;
        if ( tmp == _papi_hwi_cpu_head ) {
            tmp = NULL;
            break;
        }
    }

    if ( tmp ) {
        _papi_hwi_cpu_head = tmp;
        THRDBG( "Found cpu 0x%x at %p\n", cpu_num, tmp );
    } else {
        THRDBG( "Did not find cpu 0x%x\n", cpu_num );
    }

    _papi_hwi_unlock( CPUS_LOCK );
    return ( tmp );
}

inline_static int
_papi_hwi_lookup_or_create_cpu( CpuInfo_t ** here, unsigned int cpu_num )
{
    THRDBG("Entry: here: %p\n", here);
    CpuInfo_t *tmp = NULL;
    int retval = PAPI_OK;

    tmp = _papi_hwi_lookup_cpu(cpu_num);
    if ( tmp == NULL )
        retval = _papi_hwi_initialize_cpu( &tmp, cpu_num );

    if ( retval == PAPI_OK )
        *here = tmp;

    return ( retval );
}

#endif