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))
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.