1914 |
// abort() function |
// abort() function |
1915 |
|
|
1916 |
InstrumentScriptVMFunction_abort::InstrumentScriptVMFunction_abort(InstrumentScriptVM* parent) |
InstrumentScriptVMFunction_abort::InstrumentScriptVMFunction_abort(InstrumentScriptVM* parent) |
1917 |
: m_vm(parent) |
: m_vm(parent) |
1918 |
{ |
{ |
1919 |
} |
} |
1920 |
|
|
1936 |
return successResult(); |
return successResult(); |
1937 |
} |
} |
1938 |
|
|
1939 |
|
// fork() function |
1940 |
|
|
1941 |
|
InstrumentScriptVMFunction_fork::InstrumentScriptVMFunction_fork(InstrumentScriptVM* parent) |
1942 |
|
: m_vm(parent) |
1943 |
|
{ |
1944 |
|
} |
1945 |
|
|
1946 |
|
VMFnResult* InstrumentScriptVMFunction_fork::exec(VMFnArgs* args) { |
1947 |
|
// check if this is actually the parent going to fork, or rather one of |
1948 |
|
// the children which is already forked |
1949 |
|
if (m_vm->m_event->forkIndex != 0) { // this is the entry point for a child ... |
1950 |
|
int forkResult = m_vm->m_event->forkIndex; |
1951 |
|
// reset so that this child may i.e. also call fork() later on |
1952 |
|
m_vm->m_event->forkIndex = 0; |
1953 |
|
return successResult(forkResult); |
1954 |
|
} |
1955 |
|
|
1956 |
|
// if we are here, then this is the parent, so we must fork this parent |
1957 |
|
|
1958 |
|
const int n = |
1959 |
|
(args->argsCount() >= 1) ? args->arg(0)->asInt()->evalInt() : 1; |
1960 |
|
const bool bAutoAbort = |
1961 |
|
(args->argsCount() >= 2) ? args->arg(1)->asInt()->evalInt() : true; |
1962 |
|
|
1963 |
|
if (m_vm->m_event->countChildHandlers() + n > MAX_FORK_PER_SCRIPT_HANDLER) { |
1964 |
|
wrnMsg("fork(): requested amount would exceed allowed limit per event handler"); |
1965 |
|
return successResult(-1); |
1966 |
|
} |
1967 |
|
|
1968 |
|
AbstractEngineChannel* pEngineChannel = |
1969 |
|
static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel); |
1970 |
|
|
1971 |
|
if (!pEngineChannel->hasFreeScriptCallbacks(n)) { |
1972 |
|
wrnMsg("fork(): global limit of event handlers exceeded"); |
1973 |
|
return successResult(-1); |
1974 |
|
} |
1975 |
|
|
1976 |
|
for (int iChild = 0; iChild < n; ++iChild) { |
1977 |
|
RTList<ScriptEvent>::Iterator itChild = |
1978 |
|
pEngineChannel->forkScriptCallback(m_vm->m_event, bAutoAbort); |
1979 |
|
if (!itChild) { // should never happen, otherwise its a bug ... |
1980 |
|
errMsg("fork(): internal error while allocating child"); |
1981 |
|
return errorResult(-1); // terminate script |
1982 |
|
} |
1983 |
|
// since both parent, as well all child script execution instances |
1984 |
|
// all land in this exect() method, the following is (more or less) |
1985 |
|
// the only feature that lets us distinguish the parent and |
1986 |
|
// respective children from each other in this exect() method |
1987 |
|
itChild->forkIndex = iChild + 1; |
1988 |
|
} |
1989 |
|
|
1990 |
|
return successResult(0); |
1991 |
|
} |
1992 |
|
|
1993 |
} // namespace LinuxSampler |
} // namespace LinuxSampler |