Uno/Binary/Spec/Environment Stack

state: draft
type: specification

Environment Stack

Feature

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.

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 *

Dependencies

• None.