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SOM Kernel Quick Reference

C/C++ Macros

(see somcdev.h)

Note: Macro arguments are given using C argument declaration syntax for arguments

that are C expressions (for example,, “string className” denotes an argument expression

that evaluates to a char* value in C), whereas macro arguments that are simply tokens

manipulated by the preprocessor in order to create C expressions are identified with

the prefix <token>.

void SOM_Assert (

boolean expression,

long errorCode);

Asserts that a boolean condition is true — that is, a C/C++ expression evaluates to a non-zero value.

void SOM_ClassLibrary (

string “ libname.dll ”);

Identifies the file name of the DLL for a SOM class library in a Windows LibMain function.

Environment * SOM_CreateLocalEnvironment ();

Creates and initializes a local Environment structure that can be passed to methods as the Environment argument.

void SOM_DestroyLocalEnvironment ( Environment * ev);

Destroys a local Environment structure; calls somExceptionFree and SOMFree.

void SOM_Error (

long errorCode);

Reports an error condition.

void SOM_Expect (

boolean expression);

Asserts that a boolean condition is expected to be true.

SOMClass SOM_GetClass (

SOMObject objPtr);

Returns a pointer to the class object of which a SOM object is an instance. Invokes no methods.

void SOM_InitEnvironment (

Environment * ev);

Initializes a locally declared Environment structure that can be passed to methods as the Environment argument.

SOMClassMgr SOM_MainProgram ( );

Identifies an application as a SOM program and registers an end-of-program exit procedure to release SOM

resources when the application terminates.

SOM_NoTrace (

<token> className,

<token> methodName);

Used to turn off method debugging. The macro arguments are not C/C++ expressions,

but simply text used by the preprocessor to create expressions.

somMethodPtr SOM_ParentNumResolve (

<token> className,

long parentNum,

somMethodTabs mtabs,

<token> methodName);

Obtains a pointer to a method procedure from a list of method tables. Used by C and C++ implementation bindings

to implement parent method calls.

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