| 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 |
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