Uno/Binary/Spec/Environment Stack

author: Kr
version: 5862
state: draft
created: 08/10/2005
type: specification

Binary UNO

Stacked Environments

Feature

UNO Environments can be:

• entered or
• left, respectively
• invoked

by a thread. The current threads environment can be asked for.

Multiple purpose environments can be entered/invoked at the same time.

Purposes of environment can be specified in any particular order:

"uno:A:B:C"

Where the order may be relevant, depending on the purpose environments.

Rationale 

API

The Enterable interface, optionally be implemented by purp environments:

typedef void uno_Enterable_enter (void * context);

typedef void uno_Enterable_leave (void * context);

typedef void uno_Enterable_callInto_v(void * context, uno_EnvCallee * pCallee, va_list param);

typedef void uno_Enterable_callOut_v (void * context, uno_EnvCallee * pCallee, va_list param);

typedef int uno_Enterable_isValid_v (void * context, rtl_uString ** ppReason);

typedef struct

{

uno_Enterable_enter * m_enter;

uno_Enterable_leave * m_leave;

uno_Enterable_callInto_v * m_callInto_v;

uno_Enterable_callOut_v * m_callOut_v;

uno_Enterable_isValid_v * m_isValid;

}

uno_Enterable;

The client API, which is thread affine:

void SAL_CALL uno_getCurrentEnvironment(uno_Environment ** ppEnv, char const * pEnv_type) SAL_THROW_EXTERN_C();

typedef void uno_EnvCallee(va_list);

void SAL_CALL uno_Environment_invoke_v(uno_Environment * pEnv, uno_EnvCallee * pCallee, va_list param) SAL_THROW_EXTERN_C();

void SAL_CALL uno_Environment_invoke (uno_Environment * pEnv, uno_EnvCallee * pCallee, ...) SAL_THROW_EXTERN_C();

void SAL_CALL uno_Environment_enter(uno_Environment * pEnv) SAL_THROW_EXTERN_C();

int SAL_CALL uno_Environment_isValid(uno_Environment * pEnv, rtl_uString ** pReason) SAL_THROW_EXTERN_C();

uno_Environment->pReserved == uno_Enterable *

Compatibility Issues

None.

Dependencies

None.