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/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "internal/iprt.h"
#include <iprt/trace.h>
#include <iprt/asm.h>
#include <iprt/err.h>
#include <iprt/thread.h>
/*******************************************************************************
* Global Variables *
*******************************************************************************/
/** The default trace buffer handle. */
static RTTRACEBUF g_hDefaultTraceBuf = NIL_RTTRACEBUF;
RTDECL(int) RTTraceSetDefaultBuf(RTTRACEBUF hTraceBuf)
{
/* Retain the new buffer. */
if (hTraceBuf != NIL_RTTRACEBUF)
{
uint32_t cRefs = RTTraceBufRetain(hTraceBuf);
if (cRefs >= _1M)
return VERR_INVALID_HANDLE;
}
RTTRACEBUF hOldTraceBuf;
#ifdef IN_RC
hOldTraceBuf = (RTTRACEBUF)ASMAtomicXchgPtr((void **)&g_hDefaultTraceBuf, hTraceBuf);
#else
ASMAtomicXchgHandle(&g_hDefaultTraceBuf, hTraceBuf, &hOldTraceBuf);
#endif
if ( hOldTraceBuf != NIL_RTTRACEBUF
&& hOldTraceBuf != hTraceBuf)
{
/* Race prevention kludge. */
#ifndef IN_RC
RTThreadSleep(33);
#endif
RTTraceBufRelease(hOldTraceBuf);
}
return VINF_SUCCESS;
}
RTDECL(RTTRACEBUF) RTTraceGetDefaultBuf(void)
{
return g_hDefaultTraceBuf;
}
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