util-atomic.h File Reference

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Macros
#define	SC_ATOMIC_DECLARE(type, name)
	wrapper to declare an atomic variable including a (spin) lock to protect it. More...
#define	SC_ATOMIC_EXTERN(type, name)
	wrapper to reference an atomic variable already declared on another file (including the spin lock) More...
#define	SC_ATOMIC_DECL_AND_INIT(type, name)
	wrapper to declare an atomic variable including a (spin) lock to protect it and initialize them. More...
#define	SC_ATOMIC_INIT(name)
	Initialize the previously declared atomic variable and it's lock. More...
#define	SC_ATOMIC_RESET(name)
	Initialize the previously declared atomic variable and it's lock. More...
#define	SC_ATOMIC_DESTROY(name)
	Destroy the lock used to protect this variable. More...
#define	SC_ATOMIC_ADD(name, val)
	add a value to our atomic variable More...
#define	SC_ATOMIC_SUB(name, val)
	sub a value from our atomic variable More...
#define	SC_ATOMIC_AND(name, val)
	Bitwise AND a value from our atomic variable. More...
#define	SC_ATOMIC_OR(name, val)
	Bitwise OR a value from our atomic variable. More...
#define	SC_ATOMIC_NAND(name, val)
	Bitwise NAND a value from our atomic variable. More...
#define	SC_ATOMIC_XOR(name, val)
	Bitwise XOR a value from our atomic variable. More...
#define	SC_ATOMIC_GET(name)
	Get the value from the atomic variable. More...
#define	SC_ATOMIC_SET(name, val)
	Set the value for the atomic variable. More...
#define	SC_ATOMIC_CAS(name, cmpval, newval)
	atomic Compare and Switch More...

Functions
void	SCAtomicRegisterTests (void)

Detailed Description

Author

Victor Julien victo.nosp@m.r@in.nosp@m.linia.nosp@m.c.ne.nosp@m.t

Pablo Rincon pablo.nosp@m..rin.nosp@m.con.c.nosp@m.resp.nosp@m.o@gma.nosp@m.il.c.nosp@m.om

API for atomic operations. Uses atomic instructions (GCC only at this time) where available, falls back to (spin)locked* operations otherwise.

To prevent developers from accidentally working with the atomic variables directly instead of through the proper macro's, a marco trick is performed that exposes different variable names than the developer uses. So if the dev uses "somevar", internally "somevar_sc_atomic__" is used.

Where available, we use sync_fetch_and_add and __sync_bool_compare_and_swap. If those are unavailable, the API transparently created a matching (spin)lock for each atomic variable. The lock will be named "somevar_sc_lock</strong>"

(*) where spinlocks are unavailable, the threading api falls back to mutex

Definition in file util-atomic.h.

Macro Definition Documentation

#define SC_ATOMIC_ADD	(		name,
			val
	)

Value:

({\
    typeof(name ## _sc_atomic__) var; \
    do { \
        SCSpinLock(&(name ## _sc_lock__)); \
        (name ## _sc_atomic__) += (val); \
        var = (name ## _sc_atomic__); \
        SCSpinUnlock(&(name ## _sc_lock__)); \
    } while(0); \
    var ; \
})

add a value to our atomic variable

Parameters

name	the atomic variable
val	the value to add to the variable

Definition at line 108 of file util-atomic.h.

Referenced by AFPPeersListCheck(), AppLayerExpectationCreate(), DefragInitConfig(), DefragLookupTrackerFromHash(), DefragTrackerMoveToSpare(), DNSCheckMemcap(), DNSIncrMemcap(), FlowAlloc(), FlowGetFlowFromHash(), FlowInitConfig(), FTPMemcapGlobalCounter(), HostAlloc(), HostInitConfig(), HostLookupHostFromHash(), HTPMemcapGlobalCounter(), HTPParseMemcap(), IPPairAlloc(), IPPairCleanup(), IPPairInitConfig(), IPPairLookupIPPairFromHash(), NapatechStreamThreadExitStats(), NoNetmapSupportExit(), NoNFLOGSupportExit(), OutputRegisterFiledataLogger(), PacketPoolWait(), PacketPoolWaitForN(), PacketProfileLoggertIdToString(), PcapIncreaseInvalidChecksum(), ReceiveAFPLoop(), RunModeIdsAFPRegister(), RunModeIdsNetmapRegister(), RunModeIdsPcapRegister(), RunModeIdsPfringRegister(), SCProfilePacketStart(), SCProfileRuleStart(), SRepReloadComplete(), StreamTcpIncrMemuse(), StreamTcpPacket(), StreamTcpReassembleIncrMemuse(), TagFlowAdd(), TagHashAddTag(), TmModuleDecodeAFPRegister(), TmModuleDecodePcapRegister(), and TmModuleDecodePfringRegister().

#define SC_ATOMIC_AND	(		name,
			val
	)

Value:

do { \
        SCSpinLock(&(name ## _sc_lock__)); \
        (name ## _sc_atomic__) &= (val); \
        SCSpinUnlock(&(name ## _sc_lock__)); \
    } while(0)

Bitwise AND a value from our atomic variable.

Parameters

name	the atomic variable
val	the value to sub from the variable

Definition at line 142 of file util-atomic.h.

Referenced by TmThreadsUnsetFlag().

#define SC_ATOMIC_CAS	(		name,
			cmpval,
			newval
	)

Value:

({ \
    char r = 0; \
    do { \
        SCSpinLock((name ## _sc_lock__)); \
        if (*(name ## _sc_atomic__) == (cmpval)) { \
            *(name ## _sc_atomic__) = (newval); \
            r = 1; \
        } \
        SCSpinUnlock((name ## _sc_lock__)); \
    } while(0); \
    r; \
})

atomic Compare and Switch

Warning

"name" is passed to us as "&var"

Definition at line 223 of file util-atomic.h.

Referenced by main(), NoNetmapSupportExit(), OutputRegisterFiledataLogger(), and PacketProfileLoggertIdToString().

#define SC_ATOMIC_DECL_AND_INIT	(		type,
			name
	)

Value:

type name ## _sc_atomic__ = 0; \
    SCSpinlock name ## _sc_lock__; \
    SCSpinInit(&(name ## _sc_lock__), 0)

wrapper to declare an atomic variable including a (spin) lock to protect it and initialize them.

Definition at line 73 of file util-atomic.h.

Referenced by PacketProfileLoggertIdToString().

#define SC_ATOMIC_DECLARE	(		type,
			name
	)

Value:

type name ## _sc_atomic__; \
    SCSpinlock name ## _sc_lock__

wrapper to declare an atomic variable including a (spin) lock to protect it.

Warning

Variable and lock are not initialized.

Definition at line 57 of file util-atomic.h.

Referenced by NoNetmapSupportExit().

#define SC_ATOMIC_DESTROY

(

name

)

Value:

do { \
        SCSpinDestroy(&(name ## _sc_lock__)); \
    } while (0)

Destroy the lock used to protect this variable.

Definition at line 98 of file util-atomic.h.

Referenced by DefragHashShutdown(), DefragTrackerClearMemory(), FlowShutdown(), GlobalsInitPreConfig(), HostFree(), HostShutdown(), HTPDestroyMemcap(), IPPairFree(), IPPairShutdown(), LiveDeviceListClean(), PacketPoolDestroy(), StreamTcpFreeConfig(), and TagDestroyCtx().

#define SC_ATOMIC_EXTERN	(		type,
			name
	)

Value:

extern type name ## _sc_atomic__; \
    extern SCSpinlock name ## _sc_lock__

wrapper to reference an atomic variable already declared on another file (including the spin lock)

Definition at line 65 of file util-atomic.h.

#define SC_ATOMIC_GET

(

name

)

Value:

({ \
    typeof(name ## _sc_atomic__) var; \
    do { \
        SCSpinLock(&(name ## _sc_lock__)); \
        var = (name ## _sc_atomic__); \
        SCSpinUnlock(&(name ## _sc_lock__)); \
    } while (0); \
    var; \
})

Get the value from the atomic variable.

Return values

var

value

Definition at line 193 of file util-atomic.h.

Referenced by AFPPeersListCheck(), AppLayerExpectationHandle(), CleanupPcapFileFileVars(), DefragHashShutdown(), DefragInitConfig(), DefragLookupTrackerFromHash(), DefragTrackerGetMemcap(), DefragTrackerGetMemuse(), DefragTrackerSetMemcap(), Detect(), DetectEngineInspectBufferGeneric(), DNSCheckMemcap(), DNSDecrMemcap(), DNSMemcapGetMemcapGlobalCounter(), DNSMemcapGetMemcapStateCounter(), DNSMemcapGetMemuseCounter(), ExpectationGetCounter(), FlowDisableFlowManagerThread(), FlowGetFlowFromHash(), FlowGetMemcap(), FlowGetMemuse(), FlowHandlePacketUpdate(), FlowInitConfig(), FlowSetMemcap(), FlowSetupPacket(), FlowShutdown(), FlowUpdateState(), FlowWorkerGetDetectCtxPtr(), FTPMemcapGlobalCounter(), FTPMemuseGlobalCounter(), HostCleanup(), HostGetActiveCount(), HostGetMemcap(), HostGetMemuse(), HostInitConfig(), HostLookupHostFromHash(), HostPrintStats(), HostSetMemcap(), HostShutdown(), HTPGetMemcap(), HTPMemcapGlobalCounter(), HTPMemuseGlobalCounter(), HTPParseMemcap(), HTPSetMemcap(), IPPairCleanup(), IPPairGetActiveCount(), IPPairGetMemcap(), IPPairGetMemuse(), IPPairInitConfig(), IPPairLookupIPPairFromHash(), IPPairPrintStats(), IPPairSetMemcap(), IPPairShutdown(), LiveDeviceListClean(), NapatechStreamThreadExitStats(), NoNetmapSupportExit(), OutputRegisterFiledataLogger(), PacketBypassCallback(), PacketPoolReturnPacket(), PcapFileGlobalInit(), SRepResetVersion(), StreamTcpCheckMemcap(), StreamTcpDecrMemuse(), StreamTcpGetMemcap(), StreamTcpInitConfig(), StreamTcpMemuseCounter(), StreamTcpReassembleCheckMemcap(), StreamTcpReassembleDecrMemuse(), StreamTcpReassembleGetMemcap(), StreamTcpReassembleMemuseGlobalCounter(), StreamTcpReassembleSetMemcap(), StreamTcpSetMemcap(), TagDestroyCtx(), TagHandlePacket(), TmModuleDecodeAFPRegister(), TmModuleDecodePcapRegister(), TmModuleDecodePfringRegister(), TmModuleFlowRecyclerRegister(), TmThreadDisableReceiveThreads(), TmThreadsCheckFlag(), TmThreadsSlotVarRun(), TmThreadWaitOnThreadInit(), VarNameStoreActivateStaging(), VarNameStoreFree(), VarNameStoreLookupById(), VarNameStoreLookupByName(), and VarNameStoreSetupStaging().

#define SC_ATOMIC_INIT

(

name

)

Value:

do { \
        SCSpinInit(&(name ## _sc_lock__), 0); \
        (name ## _sc_atomic__) = 0; \
    } while(0)

Initialize the previously declared atomic variable and it's lock.

Definition at line 82 of file util-atomic.h.

Referenced by AFPPeersListCheck(), AFPPeersListInit(), AppLayerExpectationSetup(), DefragInitConfig(), DefragTrackerMoveToSpare(), DetectEngineResetMaxSigId(), DNSConfigSetGlobalMemcap(), FlowInitConfig(), HostAlloc(), HostInitConfig(), HTPParseMemcap(), IPPairAlloc(), IPPairInitConfig(), LiveRegisterDevice(), LogFilestoreRegister(), LogTlsStoreRegister(), main(), NoNetmapSupportExit(), OutputFiledataLoggerRegister(), OutputFilestoreRegister(), PacketPoolInit(), PacketPoolInitEmpty(), PcapFileGlobalInit(), PcapLogRegister(), RegisterHTPParsers(), RunModeIdsAFPRegister(), RunModeIdsNetmapRegister(), RunModeIdsPcapRegister(), RunModeIdsPfringRegister(), SCProfilingInit(), SRepInit(), StreamTcpInitConfig(), StreamTcpInitMemuse(), StreamTcpReassembleInitMemuse(), TagInitCtx(), TmModuleDetectLoaderRegister(), TmModuleFlowManagerRegister(), TmModuleFlowRecyclerRegister(), TmModuleNapatechStreamRegister(), TmSlotSetFuncAppend(), TmThreadCreate(), Unified2AlertInitCtx(), and VarNameStoreSetupStaging().

#define SC_ATOMIC_NAND	(		name,
			val
	)

Value:

do { \
        SCSpinLock(&(name ## _sc_lock__)); \
        (name ## _sc_atomic__) = ~(name ## _sc_atomic__) & (val); \
        SCSpinUnlock(&(name ## _sc_lock__)); \
    } while(0)

Bitwise NAND a value from our atomic variable.

Parameters

name	the atomic variable
val	the value to sub from the variable

Definition at line 168 of file util-atomic.h.

#define SC_ATOMIC_OR	(		name,
			val
	)

Value:

do { \
        SCSpinLock(&(name ## _sc_lock__)); \
        (name ## _sc_atomic__) |= (val); \
        SCSpinUnlock(&(name ## _sc_lock__)); \
    } while(0)

Bitwise OR a value from our atomic variable.

Parameters

name	the atomic variable
val	the value to sub from the variable

Definition at line 155 of file util-atomic.h.

Referenced by AppLayerHtpEnableRequestBodyCallback(), AppLayerHtpEnableResponseBodyCallback(), AppLayerHtpNeedFileInspection(), FlowSetupPacket(), and TmThreadsSetFlag().

#define SC_ATOMIC_RESET

(

name

)

Value:

do { \
        (name ## _sc_atomic__) = 0; \
    } while(0)

Initialize the previously declared atomic variable and it's lock.

Definition at line 91 of file util-atomic.h.

Referenced by PacketPoolReturnPacket(), RunModeIdsAFPRegister(), RunModeIdsNetmapRegister(), RunModeIdsPfringRegister(), and UTHBuildPacketOfFlows().

#define SC_ATOMIC_SET	(		name,
			val
	)

Value:

({       \
    typeof(name ## _sc_atomic__) var; \
    do { \
        SCSpinLock(&(name ## _sc_lock__)); \
        var = (name ## _sc_atomic__) = val; \
        SCSpinUnlock(&(name ## _sc_lock__)); \
    } while (0); \
    var; \
})

Set the value for the atomic variable.

Return values

var

value

Definition at line 208 of file util-atomic.h.

Referenced by AFPPeersListCheck(), AFPPeersListInit(), DefragInitConfig(), DefragTrackerSetMemcap(), Detect(), FlowDisableFlowManagerThread(), FlowDisableFlowRecyclerThread(), FlowGetFlowFromHash(), FlowInitConfig(), FlowSetMemcap(), FlowTimeoutsEmergency(), FlowTimeoutsInit(), FlowUpdateState(), FlowWorkerReplaceDetectCtx(), HostInitConfig(), HostSetMemcap(), HTPParseMemcap(), HTPSetMemcap(), IPPairInitConfig(), IPPairSetMemcap(), LogFilestoreRegister(), OutputFilestoreRegister(), ReceiveErfDagThreadExitStats(), SRepReloadComplete(), StreamTcpInitConfig(), StreamTcpReassembleSetMemcap(), StreamTcpSetMemcap(), TmModuleDecodeAFPRegister(), TmModuleDecodePcapRegister(), TmModuleFlowRecyclerRegister(), TmSlotSetFuncAppend(), TmThreadsSlotVarRun(), VarNameStoreActivateStaging(), and VarNameStoreFree().

#define SC_ATOMIC_SUB	(		name,
			val
	)

Value:

({ \
    typeof(name ## _sc_atomic__) var; \
    do { \
        SCSpinLock(&(name ## _sc_lock__)); \
        (name ## _sc_atomic__) -= (val); \
        var = (name ## _sc_atomic__); \
        SCSpinUnlock(&(name ## _sc_lock__)); \
    } while(0); \
    var ; \
})

sub a value from our atomic variable

Parameters

name	the atomic variable
val	the value to sub from the variable

Definition at line 125 of file util-atomic.h.

Referenced by AppLayerExpectationGetDataId(), DefragHashShutdown(), DefragTrackerMoveToSpare(), DetectTagDataListFree(), DNSDecrMemcap(), FlowAlloc(), FlowFree(), FlowShutdown(), HostFree(), HostMoveToSpare(), HostShutdown(), HTPParseMemcap(), IPPairFree(), IPPairMoveToSpare(), IPPairShutdown(), RunModeIdsAFPRegister(), RunModeIdsNetmapRegister(), RunModeIdsPcapRegister(), RunModeIdsPfringRegister(), StreamTcpDecrMemuse(), StreamTcpReassembleDecrMemuse(), TagHashAddTag(), TagTimeoutCheck(), and TmModuleDecodeAFPRegister().

#define SC_ATOMIC_XOR	(		name,
			val
	)

Value:

do { \
        SCSpinLock(&(name ## _sc_lock__)); \
        (name ## _sc_atomic__) ^= (val); \
        SCSpinUnlock(&(name ## _sc_lock__)); \
    } while(0)

Bitwise XOR a value from our atomic variable.

Parameters

name	the atomic variable
val	the value to sub from the variable

Definition at line 181 of file util-atomic.h.

Function Documentation

void SCAtomicRegisterTests

(

void

)

Definition at line 66 of file util-atomic.c.

References UtRegisterTest().

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