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Last change
on this file since 39627 was 39327, checked in by vboxsync, 13 years ago |
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scm whitespace cleanups.
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Property svn:eol-style
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native
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Property svn:keywords
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Author Date Id Revision
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File size:
1.5 KB
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| 1 |
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| 2 | /*******************************************************************************
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| 3 | * Header Files *
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| 4 | *******************************************************************************/
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| 5 | #include "internal/iprt.h"
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| 6 | #include <iprt/trace.h>
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| 7 |
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| 8 | #include <iprt/asm.h>
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| 9 | #include <iprt/err.h>
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| 10 | #include <iprt/thread.h>
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| 11 |
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| 12 |
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| 13 | /*******************************************************************************
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| 14 | * Global Variables *
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| 15 | *******************************************************************************/
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| 16 | /** The default trace buffer handle. */
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| 17 | static RTTRACEBUF g_hDefaultTraceBuf = NIL_RTTRACEBUF;
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| 18 |
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| 19 |
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| 20 |
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| 21 | RTDECL(int) RTTraceSetDefaultBuf(RTTRACEBUF hTraceBuf)
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| 22 | {
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| 23 | /* Retain the new buffer. */
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| 24 | if (hTraceBuf != NIL_RTTRACEBUF)
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| 25 | {
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| 26 | uint32_t cRefs = RTTraceBufRetain(hTraceBuf);
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| 27 | if (cRefs >= _1M)
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| 28 | return VERR_INVALID_HANDLE;
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| 29 | }
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| 30 |
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| 31 | RTTRACEBUF hOldTraceBuf;
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| 32 | #ifdef IN_RC
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| 33 | hOldTraceBuf = (RTTRACEBUF)ASMAtomicXchgPtr((void **)&g_hDefaultTraceBuf, hTraceBuf);
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| 34 | #else
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| 35 | ASMAtomicXchgHandle(&g_hDefaultTraceBuf, hTraceBuf, &hOldTraceBuf);
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| 36 | #endif
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| 37 |
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| 38 | if ( hOldTraceBuf != NIL_RTTRACEBUF
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| 39 | && hOldTraceBuf != hTraceBuf)
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| 40 | {
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| 41 | /* Race prevention kludge. */
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| 42 | #ifndef IN_RC
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| 43 | RTThreadSleep(33);
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| 44 | #endif
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| 45 | RTTraceBufRelease(hOldTraceBuf);
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| 46 | }
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| 47 |
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| 48 | return VINF_SUCCESS;
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| 49 | }
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| 50 |
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| 51 |
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| 52 | RTDECL(RTTRACEBUF) RTTraceGetDefaultBuf(void)
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| 53 | {
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| 54 | return g_hDefaultTraceBuf;
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| 55 | }
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| 56 |
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