_go32_dpmi_allocate_iret_wrapper

Syntax

#include <dpmi.h>

int _go32_dpmi_allocate_iret_wrapper(_go32_dpmi_seginfo *info);

Description

See section DPMI Overview

This function creates a small assembler function that handles the overhead of servicing an interrupt. To use, put the address of your servicing function in the pm_offset field of info and call this function. The pm_field will get replaced with the address of the wrapper function, which you pass to both _go32_dpmi_set_protected_mode_interrupt_vector and _go32_dpmi_free_iret_wrapper.

See section _go32_dpmi_set_protected_mode_interrupt_vector See section _go32_dpmi_free_iret_wrapper

Return Value

Zero on success, nonzero on failure.

Portability

not ANSI, not POSIX

Example

_go32_dpmi_seginfo info;
info.pm_offset = my_handler;
_go32_dpmi_allocate_iret_wrapper(&info);
_go32_dpmi_set_protected_mode_interrupt_handler(0x75, &info);
...
_go32_dpmi_free_iret_wrapper(&info);

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