Shared Library Management Routines

The shl_load Shared Library Management Routines

BIND_FIRST BIND_TOGETHER causes the library being loaded and its dependent libraries to be bound all at the same time, thereby resolving interdependencies. If you are not using BIND_FIRST, libraries are bound together by default so this option has no effect.

BIND_BREADTH_FIRST Modifier

64-bit mode only:

This flag causes the dependent libraries to be loaded breadth first. By default, the 64-bit mode shl_load loads dependent libraries depth-first. This modifier overrides the default load order.

Binding Flags Examples

Suppose you have the libraries libE.sl, libF.sl, and libG.sl. The libE library depends on libF and libF depends on libG. In addition, libG depends on libFlibFand libG are interdependent. Your program loads libE.sl with shl_load().

When using BIND_DEFERRED or BIND_IMMEDIATE without

BIND_FIRST, these libraries are loaded such that all symbols are visible and the interdependencies are resolved:

shl_t libE;

libE = shl_load("libE.sl", BIND_IMMEDIATE, 0); shl_load succeeds.

When using BIND_IMMEDIATE BIND_FIRST, however, libG is loaded and bound first and since it depends on libF, an error results because the needed symbols in libF are not yet available:

libE = shl_load("libE.sl", BIND_IMMEDIATE BIND_FIRST, 0);

shl_load fails.

Using BIND_IMMEDIATE BIND_FIRST BIND_TOGETHER loads libE, libF, and libG together and correctly resolves all symbols:

libE = shl_load("libE.sl", BIND_IMMEDIATE BIND_FIRST BIND_TOG ETHER, 0);

shl_load succeeds.

The shl_findsym Routine

Obtains the address of an exported symbol from a shared library. To call a routine or access data in an explicitly loaded library, first get the address of the routine or data with shl_findsym.

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Kenwood HP 9000 manual Shlfindsym Routine, Bindbreadthfirst Modifier, Binding Flags Examples, 222

HP 9000 specifications

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