minix/kernel/vm.h

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#ifndef _VM_H
#define _VM_H 1
#define CHECKRANGE_OR_SUSPEND(pr, start, length, wr) { int mr; \
if(vm_running && (mr=vm_checkrange(proc_addr(who_p), pr, start, length, wr, 0)) != OK) { \
return mr; \
} }
#define CHECKRANGE(pr, start, length, wr) \
vm_checkrange(proc_addr(who_p), pr, start, length, wr, 1)
/* Pseudo error code indicating a process request has to be
* restarted after an OK from VM.
*/
#define VMSUSPEND -996
#endif