DCMD_PROC

Get the interrupt handlers owned by the process associated with the file descriptor.

#include <sys/procfs.h>

#define DCMD_PROC_IRQS32  (__DIOF(_DCMD_PROC, __PROC_SUBCMD_PROCFS + 24, procfs_irq32))
#define DCMD_PROC_IRQS64  (__DIOF(_DCMD_PROC, __PROC_SUBCMD_PROCFS + 24, procfs_irq64))
#define DCMD_PROC_IRQS    (__DIOF(_DCMD_PROC, __PROC_SUBCMD_PROCFS + 24, procfs_irq))

Note: The generic command maps onto the 64-bit version, unless you're compiling for a 32-bit architecture and you define WANT_OLD_DEVCTLS before you include <sys/procfs.h>.

The arguments to devctl() are:

Argument	Value
`filedes`	A file descriptor for the process.
`dcmd`	DCMD_PROC_IRQS
`dev_data_ptr`	NULL, or an array of procfs_irq structures
`n_bytes`	0, or the size of the array
`dev_info_ptr`	A pointer to an integer where the number of interrupt handlers can be stored

Call this the first time with an argument of NULL to get the number of interrupt handlers:

devctl( fd, DCMD_PROC_IRQS, NULL, 0, &n);

Next, allocate a buffer that's large enough to hold a procfs_irq structure (see debug_irq_t in <sys/debug.h>) for each handler, and pass it to another devctl() call:

my_buffer = (procfs_irq *) malloc( sizeof(procfs_irq) * n );
if ( my_buffer == NULL ) {
  /* Not enough memory. */
}

devctl( fd, DCMD_PROC_IRQS, my_buffer, sizeof(procfs_irq) * n,
        &dummy);

For more information, see the section on DCMD_PROC_IRQS in the appendix about the /procfs filesystem in The QNX Neutrino Cookbook.