cbdata.h File Reference

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Classes
class	CbdataParent
class	generic_cbdata
class	CallbackData
	an old-style void* callback parameter More...

Macros
#define	cbdataReferenceValidDone(var, ptr)   cbdataInternalReferenceDoneValid((void **)&(var), (ptr))
#define	CBDATA_DECL_(type, methodSpecifiers)
	declaration-generator used internally by CBDATA_CLASS() and CBDATA_CHILD() More...
#define	CBDATA_CLASS(type)   CBDATA_DECL_(type, noexcept)
#define	CBDATA_CHILD(type)   CBDATA_DECL_(type, override final)
#define	CBDATA_CLASS_INIT(type)   cbdata_type type::CBDATA_##type = CBDATA_UNKNOWN
#define	CBDATA_NAMESPACED_CLASS_INIT(namespace, type)   cbdata_type namespace::type::CBDATA_##type = CBDATA_UNKNOWN
#define	cbdataReference(var)   (cbdataInternalLock(var), var)
#define	cbdataReferenceDone(var)   do {if (var) {cbdataInternalUnlock(var); var = nullptr;}} while(0)

Typedefs
typedef int	cbdata_type

Functions
void	cbdataRegisterWithCacheManager (void)
void *	cbdataInternalAlloc (cbdata_type type, const char *, int)
void *	cbdataInternalFree (void *p, const char *, int)
void	cbdataInternalLock (const void *p)
void	cbdataInternalUnlock (const void *p)
int	cbdataInternalReferenceDoneValid (void **p, void **tp)
int	cbdataReferenceValid (const void *p)
cbdata_type	cbdataInternalAddType (cbdata_type type, const char *label, int size)

Variables
static const cbdata_type	CBDATA_UNKNOWN = 0

Macro Definition Documentation

CBDATA_CHILD

#define CBDATA_CHILD

(

type

)

CBDATA_DECL_(type, override final)

cbdata-enables a CbdataParent child class (including grandchildren) sets the class declaration section to "private" use this at the start of your class declaration for consistency sake

Definition at line 307 of file cbdata.h.

CBDATA_CLASS

#define CBDATA_CLASS

(

type

)

CBDATA_DECL_(type, noexcept)

cbdata-enables a stand-alone class that is not a CbdataParent child sets the class declaration section to "private" use this at the start of your class declaration for consistency sake

Definition at line 302 of file cbdata.h.

CBDATA_CLASS_INIT

#define CBDATA_CLASS_INIT

(

type

)

cbdata_type type::CBDATA_##type = CBDATA_UNKNOWN

Creates a global instance pointer for the CBDATA memory allocator to allocate and free objects for the matching CBDATA_CLASS().

Place this in the appropriate .cc file for the class being registered.

May be placed inside an explicit namespace scope declaration, or CBDATA_NAMESPACED_CLASS_INIT() used instead.

Definition at line 318 of file cbdata.h.

CBDATA_DECL_

#define CBDATA_DECL_	(		type,
			methodSpecifiers
	)

Value:

    public: \
        void *operator new(size_t size) { \
          assert(size == sizeof(type)); \
          if (!CBDATA_##type) CBDATA_##type = cbdataInternalAddType(CBDATA_##type, #type, sizeof(type)); \
          return (type *)cbdataInternalAlloc(CBDATA_##type,__FILE__,__LINE__); \
        } \
        void operator delete (void *address) { \
          if (address) cbdataInternalFree(address,__FILE__,__LINE__); \
        } \
        void *toCbdata() methodSpecifiers { return this; } \
    private: \
       static cbdata_type CBDATA_##type;

Definition at line 276 of file cbdata.h.

CBDATA_NAMESPACED_CLASS_INIT

#define CBDATA_NAMESPACED_CLASS_INIT	(		namespace,
			type
	)		cbdata_type namespace::type::CBDATA_##type = CBDATA_UNKNOWN

Creates a global instance pointer for the CBDATA memory allocator to allocate and free objects for the matching CBDATA_CLASS().

Place this in the appropriate .cc file for the class being registered.

Definition at line 326 of file cbdata.h.

cbdataReference

#define cbdataReference

(

var

)

(cbdataInternalLock(var), var)

Creates a new reference to a cbdata entry. Used when you need to store a reference in another structure. The reference can later be verified for validity by cbdataReferenceValid().

Deprecated:

Prefer the use of CbcPointer<> smart pointer.

Parameters

var	The reference variable is a pointer to the entry, in all aspects identical to the original pointer. But semantically it is quite different. It is best if the reference is thought of and handled as a "void *".

Definition at line 341 of file cbdata.h.

cbdataReferenceDone

#define cbdataReferenceDone

(

var

)

do {if (var) {cbdataInternalUnlock(var); var = nullptr;}} while(0)

Removes a reference created by cbdataReference().

Deprecated:

Prefer the use of CbcPointer<> smart pointer.

Parameters

var	The reference variable. Will be automatically cleared to nullptr

Definition at line 350 of file cbdata.h.

cbdataReferenceValidDone

#define cbdataReferenceValidDone	(		var,
			ptr
	)		cbdataInternalReferenceDoneValid((void **)&(var), (ptr))

Definition at line 256 of file cbdata.h.

Typedef Documentation

cbdata_type

typedef int cbdata_type

cbdata types. Similar to the MEM_* types, but managed in cbdata.cc A big difference is that cbdata types are dynamically allocated.

Initially only UNKNOWN type is predefined. Other types are added at runtime by CBDATA_CLASS().

Definition at line 195 of file cbdata.h.

Function Documentation

cbdataInternalAddType()

cbdata_type cbdataInternalAddType	(	cbdata_type	type,
		const char *	label,
		int	size
	)

Create a run-time registration for the class type with cbdata memory allocator.

Note

For internal CBDATA use only.

Definition at line 196 of file cbdata.cc.

References cbdata_types, and type.

cbdataInternalAlloc()

void * cbdataInternalAlloc	(	cbdata_type	type,
		const char *	file,
		int	line
	)

Allocates a new entry of a registered CBDATA type.

Note

For internal CBDATA use only.

Definition at line 223 of file cbdata.cc.

References MemAllocator::alloc(), assert, cbdata_htable, cbdata_index, cbdata_types, cbdataCount, cbdata::cookie, cbdata::Cookie, cbdata::data, debugs, dlinkAdd(), cbdata::locks, CBDataIndex::pool, cbdata::type, type, and cbdata::valid.

cbdataInternalFree()

void * cbdataInternalFree	(	void *	p,
		const char *	file,
		int	line
	)

Frees a entry allocated by cbdataInternalAlloc().

Once this has been called cbdataReferenceValid() and cbdataReferenceValidDone() will return false regardless of whether there are remaining cbdata references.

cbdataReferenceDone() must still be called for any active references to the cbdata entry. The cbdata entry will be freed only when the last reference is removed.

Note

For internal CBDATA use only.

Definition at line 301 of file cbdata.cc.

References assert, cbdataRealFree(), debugs, cbdata::FromUserData(), and xfree.

cbdataInternalLock()

void cbdataInternalLock

(

const void *

p

)

Definition at line 331 of file cbdata.cc.

References assert, debugs, cbdata::FromUserData(), and INT_MAX.

Referenced by logfile_mod_daemon_open().

cbdataInternalReferenceDoneValid()

int cbdataInternalReferenceDoneValid	(	void **	p,
		void **	tp
	)

Removes a reference created by cbdataReference() and checks it for validity. Meant to be used on the last dereference, usually to make a callback.

void *cbdata;
...
if (cbdataReferenceValidDone(reference, &cbdata)))
    callback(..., cbdata);

Parameters

var	The reference variable. Will be automatically cleared to nullptr
ptr	A temporary pointer to the referenced data (if valid).

Definition at line 418 of file cbdata.cc.

References cbdataInternalUnlock(), and cbdataReferenceValid().

cbdataInternalUnlock()

void cbdataInternalUnlock

(

const void *

p

)

Definition at line 357 of file cbdata.cc.

References assert, cbdataRealFree(), debugs, cbdata::FromUserData(), and NULL.

Referenced by cbdataInternalReferenceDoneValid(), and logfile_mod_daemon_close().

cbdataReferenceValid()

int cbdataReferenceValid

(

const void *

p

)

Parameters

p	A cbdata entry reference pointer.

Return values

0	A reference is stale. The pointer refers to a entry already freed.
true	The reference is valid and active.

Definition at line 398 of file cbdata.cc.

References assert, debugs, and cbdata::FromUserData().

Referenced by CbcPointer< Cbc >::CbcPointer(), ConnStateData::borrowPinnedConnection(), ACLChecklist::calcImplicitAnswer(), ACLChecklist::callerGone(), AsyncJob::callException(), AsyncJob::callStart(), StoreIOStateCb::canDial(), EventDialer::canDial(), CommCbFunPtrCallT< Dialer >::canFire(), cbdataInternalReferenceDoneValid(), EventScheduler::checkEvents(), helper_server::checkForTimedOutRequests(), clientGetMoreData(), clientSocketDetach(), clientSocketRecipient(), clientStreamDetach(), ACLFilledChecklist::conn(), diskHandleRead(), downloaderRecipient(), EventScheduler::dump(), esiBufferRecipient(), esiProcessStream(), esiStreamDetach(), esiStreamRead(), esiStreamStatus(), externalAclHandleReply(), ACLChecklist::fastCheck(), store_client::finishCallback(), ftpSendReply(), CbcPointer< Cbc >::get(), ClientHttpRequest::getConn(), Comm::Connection::getPeer(), DiskdIOStrategy::handle(), helperDispatch(), helperHandleRead(), helperReturnBuffer(), helperStatefulDispatch(), helperStatefulHandleRead(), ClientRequestContext::httpStateIsValid(), idnsCallbackOneWithAnswer(), ConnStateData::isOpen(), TunnelStateData::keepGoingAfterRead(), ClientHttpRequest::noteAdaptationAnswer(), CbcPointer< Cbc >::operator=(), peerCountMcastPeersAbort(), peerDigestCheck(), peerDigestFetchedEnough(), peerDigestHandleReply(), ACLChecklist::prepNonBlocking(), TunnelStateData::ReadClient(), TunnelStateData::ReadServer(), clientReplyContext::sendMoreData(), SslBumpEstablish(), tunnelStartShoveling(), CallbackData::valid(), PeerPoolMgr::validPeer(), TunnelStateData::writeClientDone(), TunnelStateData::WriteClientDone(), TunnelStateData::writeServerDone(), and TunnelStateData::WriteServerDone().

cbdataRegisterWithCacheManager()

void cbdataRegisterWithCacheManager

(

void

)

Create a run-time registration of CBDATA component with the Squid cachemgr

Definition at line 209 of file cbdata.cc.

References cbdataDump, and Mgr::RegisterAction().

Referenced by mainInitialize().

Variable Documentation

CBDATA_UNKNOWN

const cbdata_type CBDATA_UNKNOWN = 0

static

Definition at line 196 of file cbdata.h.