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#include <config.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include "syscontr.h"
#include "syscall.h"
#ifdef __GNUG__
#pragma implementation
#endif
//----------------------------------------------------------------------
// Controller-Implementation
//----------------------------------------------------------------------
//
// default contstructor
//
SystemcallsSingletoncontroller::SystemcallsSingletoncontroller()
{
SysCalls = NULL;
}
//
// destructor
//
// destroy structs for leaving program
// open question: should we stop here childs?
// Asger says no: I like to have my xdvi open after closing LyX. Maybe
// I want to print or something.
SystemcallsSingletoncontroller::~SystemcallsSingletoncontroller()
{
ControlledCalls *next;
while (SysCalls)
{
next = SysCalls->next;
delete SysCalls;
SysCalls = next;
}
}
//
// Add childprocessinformation into controlled list
//
void
SystemcallsSingletoncontroller::AddCall(Systemcalls const &newcall)
{
// not yet implemented
ControlledCalls *newCall = new ControlledCalls;
if (newCall == NULL) // sorry, no idea
return;
newCall->next = SysCalls;
newCall->call = new Systemcalls(newcall);
SysCalls = newCall;
}
//
// Timer-call
//
// Check list, if there is a stopped child. If yes, call-back.
//
void
SystemcallsSingletoncontroller::Timer()
{
// check each entry of our list, if it's finished
ControlledCalls *prev = NULL;
for (ControlledCalls *actCall=SysCalls; actCall; actCall=actCall->next)
{
pid_t pid=actCall->call->Getpid();
int stat_loc;
waitpid(pid, &stat_loc, WNOHANG);
if (WIFEXITED(stat_loc) || WIFSIGNALED(stat_loc)) {
// Ok, the return value goes into retval.
if (WIFEXITED(stat_loc)) {
actCall->call->setRetValue(WEXITSTATUS(stat_loc));
} else {
// Child died, so pretend it returned 1
actCall->call->setRetValue(1);
}
// callback and release
actCall->call->Callback();
if (actCall == SysCalls) {
SysCalls = actCall->next;
} else {
prev->next = actCall->next;
}
delete actCall;
actCall = prev;
}
prev = actCall;
}
}
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