removed the containing subdir
This commit is contained in:
476
kernel/System.moo
Normal file
476
kernel/System.moo
Normal file
@ -0,0 +1,476 @@
|
||||
// TODO: consider if System can replace Apex itself.
|
||||
// System, being the top class, seems to give very natural way of
|
||||
// offering global system-level functions and interfaces.
|
||||
//
|
||||
// class System(nil) { ... }
|
||||
// class Object(System) { .... }
|
||||
// System at: #
|
||||
// System logNl: 'xxxxx'.
|
||||
// System getUint8(ptr,offset)
|
||||
|
||||
class System(Apex)
|
||||
{
|
||||
var(#class) asyncsg.
|
||||
var(#class) gcfin_sem.
|
||||
var(#class) gcfin_should_exit := false.
|
||||
var(#class) ossig_pid.
|
||||
var(#class) shr. // signal handler registry
|
||||
|
||||
pooldic Log
|
||||
{
|
||||
// -----------------------------------------------------------
|
||||
// defines log levels
|
||||
// these items must follow defintions in moo.h
|
||||
// -----------------------------------------------------------
|
||||
|
||||
DEBUG := 1,
|
||||
INFO := 2,
|
||||
WARN := 4,
|
||||
ERROR := 8,
|
||||
FATAL := 16
|
||||
}
|
||||
|
||||
method(#class) _initialize
|
||||
{
|
||||
self.shr := OrderedCollection new.
|
||||
self.asyncsg := SemaphoreGroup new.
|
||||
}
|
||||
|
||||
method(#class) addAsyncSemaphore: sem
|
||||
{
|
||||
^self.asyncsg addSemaphore: sem
|
||||
}
|
||||
|
||||
method(#class) removeAsyncSemaphore: sem
|
||||
{
|
||||
^self.asyncsg removeSemaphore: sem
|
||||
}
|
||||
|
||||
method(#class) handleAsyncEvent
|
||||
{
|
||||
^self.asyncsg wait.
|
||||
}
|
||||
|
||||
method(#class) installSignalHandler: block
|
||||
{
|
||||
self.shr addLast: block.
|
||||
}
|
||||
|
||||
method(#class) uninstallSignalHandler: block
|
||||
{
|
||||
self.shr remove: block.
|
||||
}
|
||||
|
||||
method(#class) startup(class_name, method_name)
|
||||
{
|
||||
| class ret gcfin_proc ossig_proc |
|
||||
|
||||
System gc.
|
||||
|
||||
class := self at: class_name. // System at: class_name.
|
||||
if (class isError)
|
||||
{
|
||||
self error: ("Unable to find the class - " & class_name).
|
||||
}.
|
||||
|
||||
self _initialize.
|
||||
|
||||
// start the gc finalizer process and os signal handler process
|
||||
//[ self __gc_finalizer ] fork.
|
||||
//[ self __os_sig_handler ] fork.
|
||||
gcfin_proc := [ self __gc_finalizer ] newSystemProcess.
|
||||
ossig_proc := [ :caller | self __os_sig_handler: caller ] newSystemProcess(thisProcess).
|
||||
|
||||
self.ossig_pid := ossig_proc id.
|
||||
|
||||
gcfin_proc resume.
|
||||
ossig_proc resume.
|
||||
|
||||
[
|
||||
// TODO: change the method signature to variadic and pass extra arguments to perform???
|
||||
ret := class perform: method_name.
|
||||
]
|
||||
ensure: [
|
||||
// signal end of the main process.
|
||||
// __os_sig_handler will terminate all running subprocesses.
|
||||
self _setSig: 16rFF.
|
||||
].
|
||||
|
||||
^ret.
|
||||
}
|
||||
|
||||
method(#class) __gc_finalizer
|
||||
{
|
||||
| tmp gc |
|
||||
|
||||
gc := false.
|
||||
|
||||
self.gcfin_should_exit := false.
|
||||
self.gcfin_sem := Semaphore new.
|
||||
self.gcfin_sem signalOnGCFin. // tell VM to signal this semaphore when it schedules gc finalization.
|
||||
|
||||
[
|
||||
while (true)
|
||||
{
|
||||
while ((tmp := self _popCollectable) notError)
|
||||
{
|
||||
if (tmp respondsTo: #finalize)
|
||||
{
|
||||
// finalize is protected with an exception handler.
|
||||
// the exception is ignored except it is logged.
|
||||
[ tmp finalize ] on: Exception do: [:ex | System longNl: "Exception in finalize - " & ex messageText ]
|
||||
}.
|
||||
}.
|
||||
|
||||
//if (Processor total_count == 1)
|
||||
//if (Processor gcfin_should_exit)
|
||||
if (self.gcfin_should_exit)
|
||||
{
|
||||
// exit from this loop when there are no other processes running except this finalizer process
|
||||
if (gc)
|
||||
{
|
||||
System logNl: "Exiting the GC finalization process " & (thisProcess id) asString.
|
||||
break.
|
||||
}.
|
||||
|
||||
System logNl: "Forcing garbage collection before termination in " & (thisProcess id) asString.
|
||||
self collectGarbage.
|
||||
gc := true.
|
||||
}
|
||||
else
|
||||
{
|
||||
gc := false.
|
||||
}.
|
||||
|
||||
self.gcfin_sem wait.
|
||||
}
|
||||
] ensure: [
|
||||
self.gcfin_sem signal. // in case the process is stuck in wait.
|
||||
self.gcfin_sem unsignal.
|
||||
System logNl: "End of GC finalization process " & (thisProcess id) asString.
|
||||
].
|
||||
}
|
||||
|
||||
method(#class) __os_sig_handler: caller
|
||||
{
|
||||
| os_intr_sem signo sh |
|
||||
|
||||
os_intr_sem := Semaphore new.
|
||||
os_intr_sem signalOnInput: System _getSigfd.
|
||||
|
||||
[
|
||||
while (true)
|
||||
{
|
||||
until ((signo := self _getSig) isError)
|
||||
{
|
||||
// TODO: Do i have to protected this in an exception handler???
|
||||
//TODO: Execute Handler for signo.
|
||||
|
||||
System logNl: "Interrupt detected - signal no - " & signo asString.
|
||||
|
||||
//System logNl: "WWWWWWWWWWWWWWWWWWWWWWWWW ".
|
||||
// user-defined signal handler is not allowed for 16rFF
|
||||
if (signo == 16rFF) { goto done }.
|
||||
//System logNl: "OHHHHHHHHHHHHHH ".
|
||||
|
||||
ifnot (self.shr isEmpty)
|
||||
{
|
||||
//System logNl: "About to execute handler for the signal detected - " & signo asString.
|
||||
self.shr do: [ :handler | handler value: signo ].
|
||||
}
|
||||
else
|
||||
{
|
||||
//System logNl: "Jumping to done detected - signal no - " & signo asString.
|
||||
if (signo == 2) { goto done }.
|
||||
}.
|
||||
}.
|
||||
//System logNl: "Waiting for signal on os_intr_sem...".
|
||||
os_intr_sem wait.
|
||||
}.
|
||||
done:
|
||||
//System logNl: "Jumped to done detected - signal no - " & signo asString.
|
||||
nil.
|
||||
]
|
||||
ensure: [
|
||||
| pid proc oldps |
|
||||
|
||||
//System logNl: "Aborting signal handler......".
|
||||
// stop subscribing to signals.
|
||||
os_intr_sem signal.
|
||||
os_intr_sem unsignal.
|
||||
|
||||
// the caller must request to terminate all its child processes..
|
||||
|
||||
// this disables autonomous process switching only.
|
||||
// TODO: check if the ensure block code can trigger process switching?
|
||||
// what happens if the ensure block creates new processes? this is likely to affect the termination loop below.
|
||||
// even the id of the terminated process may get reused....
|
||||
oldps := self _toggleProcessSwitching: false.
|
||||
|
||||
/*
|
||||
0 -> startup <--- this should also be stored in the "caller" variable.
|
||||
1 -> __gc_finalizer
|
||||
2 -> __os_sig_handler
|
||||
3 .. -> other processes started by application.
|
||||
|
||||
from the second run onwards, the starting pid may not be 0.
|
||||
*/
|
||||
//proc := System _findNextProcess: self.ossig_pid.
|
||||
proc := System _findFirstProcess.
|
||||
while (proc notError)
|
||||
{
|
||||
pid := proc id.
|
||||
if (proc isNormal)
|
||||
{
|
||||
System logNl: ("Requesting to terminate process of id - " & pid asString).
|
||||
proc terminate.
|
||||
}.
|
||||
proc := System _findNextProcess: pid.
|
||||
}.
|
||||
|
||||
System logNl: "Requesting to terminate the caller process of id " & (caller id) asString.
|
||||
caller terminate. // terminate the startup process.
|
||||
self _toggleProcessSwitching: oldps.
|
||||
|
||||
System logNl: ">>>>End of OS signal handler process " & (thisProcess id) asString.
|
||||
|
||||
self.gcfin_should_exit := true.
|
||||
self.gcfin_sem signal. // wake the gcfin process.
|
||||
|
||||
self _halting. // inform VM that it should get ready for halting.
|
||||
].
|
||||
}
|
||||
|
||||
method(#class,#primitive) _getSig.
|
||||
method(#class,#primitive) _getSigfd.
|
||||
method(#class,#primitive) _setSig: signo.
|
||||
method(#class,#primitive) _halting.
|
||||
method(#class,#primitive) _toggleProcessSwitching: v.
|
||||
method(#class,#primitive,#lenient) _findProcessById: id.
|
||||
method(#class,#primitive,#lenient) _findFirstProcess.
|
||||
method(#class,#primitive,#lenient) _findLastProcess.
|
||||
method(#class,#primitive,#lenient) _findPreviousProcess: p. // process id or process object
|
||||
method(#class,#primitive,#lenient) _findNextProcess: p. // process id or process object
|
||||
|
||||
method(#class,#primitive) _popCollectable.
|
||||
method(#class,#primitive) collectGarbage.
|
||||
method(#class,#primitive) gc.
|
||||
method(#class,#primitive) return: object to: context.
|
||||
|
||||
// =======================================================================================
|
||||
|
||||
method(#class) sleepForSecs: secs
|
||||
{
|
||||
// -----------------------------------------------------
|
||||
// put the calling process to sleep for given seconds.
|
||||
// -----------------------------------------------------
|
||||
| s |
|
||||
s := Semaphore new.
|
||||
s signalAfterSecs: secs.
|
||||
s wait.
|
||||
}
|
||||
|
||||
method(#class) sleepForSecs: secs nanosecs: nanosecs
|
||||
{
|
||||
// -----------------------------------------------------
|
||||
// put the calling process to sleep for given seconds.
|
||||
// -----------------------------------------------------
|
||||
| s |
|
||||
s := Semaphore new.
|
||||
s signalAfterSecs: secs nanosecs: nanosecs.
|
||||
s wait.
|
||||
}
|
||||
|
||||
// the following methods may not look suitable to be placed
|
||||
// inside a system dictionary. but they are here for quick and dirty
|
||||
// output production from the moo code.
|
||||
// System logNl: 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'.
|
||||
//
|
||||
method(#class,#variadic,#primitive) log(level,msg1).
|
||||
|
||||
/*
|
||||
TODO: how to pass all variadic arguments to another variadic methods???
|
||||
method(#class,#variadic) logInfo (msg1)
|
||||
{
|
||||
^self log (System.Log.INFO,msg1)
|
||||
}
|
||||
*/
|
||||
method(#class) atLevel: level log: message
|
||||
{
|
||||
<primitive: #System_log>
|
||||
// do nothing upon logging failure
|
||||
}
|
||||
|
||||
method(#class) atLevel: level log: message and: message2
|
||||
{
|
||||
<primitive: #System_log>
|
||||
// do nothing upon logging failure
|
||||
}
|
||||
|
||||
method(#class) atLevel: level log: message and: message2 and: message3
|
||||
{
|
||||
<primitive: #System_log>
|
||||
// do nothing upon logging failure
|
||||
}
|
||||
|
||||
method(#class) atLevel: level logNl: message
|
||||
{
|
||||
// the #_log primitive accepts an array.
|
||||
// so the following lines should work also.
|
||||
// | x |
|
||||
// x := Array new: 2.
|
||||
// x at: 0 put: message.
|
||||
// x at: 1 put: "\n".
|
||||
// ^self atLevel: level log: x.
|
||||
|
||||
^self atLevel: level log: message and: "\n".
|
||||
}
|
||||
|
||||
method(#class) atLevel: level logNl: message and: message2
|
||||
{
|
||||
^self atLevel: level log: message and: message2 and: "\n".
|
||||
}
|
||||
|
||||
method(#class) log: message
|
||||
{
|
||||
^self atLevel: System.Log.INFO log: message.
|
||||
}
|
||||
|
||||
method(#class) log: message and: message2
|
||||
{
|
||||
^self atLevel: System.Log.INFO log: message and: message2.
|
||||
}
|
||||
|
||||
method(#class) logNl
|
||||
{
|
||||
^self atLevel: System.Log.INFO log: "\n".
|
||||
}
|
||||
|
||||
method(#class) logNl: message
|
||||
{
|
||||
^self atLevel: System.Log.INFO logNl: message.
|
||||
}
|
||||
|
||||
method(#class) logNl: message and: message2
|
||||
{
|
||||
^self atLevel: System.Log.INFO logNl: message and: message2.
|
||||
}
|
||||
|
||||
method(#class) backtrace
|
||||
{
|
||||
| ctx oldps |
|
||||
// TOOD: IMPROVE THIS EXPERIMENTAL BACKTRACE... MOVE THIS TO System>>backtrace and skip the first method context for backtrace itself.
|
||||
// TODO: make this method atomic? no other process should get scheduled while this function is running?
|
||||
// possible imementation methods:
|
||||
// 1. disable task switching? ->
|
||||
// 2. use a global lock.
|
||||
// 3. make this a primitive function. -> natually no callback.
|
||||
// 4. introduce a new method attribute. e.g. #atomic -> vm disables task switching or uses a lock to achieve atomicity.
|
||||
// >>>> i think it should not be atomic as a while. only logging output should be produeced at one go.
|
||||
|
||||
oldps := System _toggleProcessSwitching: false.
|
||||
System logNl: "== BACKTRACE ==".
|
||||
|
||||
//ctx := thisContext.
|
||||
ctx := thisContext sender. // skip the current context. skip to the caller context.
|
||||
while (ctx notNil)
|
||||
{
|
||||
// if (ctx sender isNil) { break }. // to skip the fake top level call context...
|
||||
|
||||
if (ctx class == MethodContext)
|
||||
{
|
||||
System log: " ";
|
||||
log: ctx method owner name;
|
||||
log: ">>";
|
||||
log: ctx method name;
|
||||
log: " (";
|
||||
log: ctx method sourceFile;
|
||||
log: " ";
|
||||
log: (ctx method ipSourceLine: (ctx pc)) asString;
|
||||
logNl: ")".
|
||||
//System logNl: (" " & ctx method owner name & ">>" & ctx method name &
|
||||
// " (" & ctx method sourceFile & " " & (ctx method ipSourceLine: (ctx pc)) asString & ")").
|
||||
}.
|
||||
// TODO: include blockcontext???
|
||||
ctx := ctx sender.
|
||||
}.
|
||||
System logNl: "== END OF BACKTRACE ==".
|
||||
System _toggleProcessSwitching: oldps.
|
||||
}
|
||||
|
||||
/* nsdic access */
|
||||
method(#class) at: key
|
||||
{
|
||||
^self nsdic at: key
|
||||
}
|
||||
|
||||
method(#class) at: key put: value
|
||||
{
|
||||
^self nsdic at: key put: value
|
||||
}
|
||||
|
||||
/* raw memory allocation */
|
||||
method(#class,#primitive) malloc (size).
|
||||
method(#class,#primitive) calloc (size).
|
||||
method(#class,#primitive) free (rawptr).
|
||||
|
||||
method(#class,#primitive) malloc: size.
|
||||
method(#class,#primitive) calloc: size.
|
||||
method(#class,#primitive) free: rawptr.
|
||||
|
||||
/* raw memory access */
|
||||
method(#class,#primitive) getInt8 (rawptr, offset). // <primitive: #System__getInt8>
|
||||
method(#class,#primitive) getInt16 (rawptr, offset).
|
||||
method(#class,#primitive) getInt32 (rawptr, offset).
|
||||
method(#class,#primitive) getInt64 (rawptr, offset).
|
||||
method(#class,#primitive) getUint8 (rawptr, offset). // <primitive: #System__getUint8>
|
||||
method(#class,#primitive) getUint16 (rawptr, offset).
|
||||
method(#class,#primitive) getUint32 (rawptr, offset).
|
||||
method(#class,#primitive) getUint64 (rawptr, offset).
|
||||
|
||||
method(#class,#primitive) putInt8 (rawptr, offset, value).
|
||||
method(#class,#primitive) putInt16 (rawptr, offset, value).
|
||||
method(#class,#primitive) putInt32 (rawptr, offset, value).
|
||||
method(#class,#primitive) putInt64 (rawptr, offset, value).
|
||||
method(#class,#primitive) putUint8 (rawptr, offset, value).
|
||||
method(#class,#primitive) putUint16 (rawptr, offset, value).
|
||||
method(#class,#primitive) putUint32 (rawptr, offset, value).
|
||||
method(#class,#primitive) putUint64 (rawptr, offset, value).
|
||||
|
||||
method(#class,#primitive) getBytes (rawptr, offset, byte_array, offset_in_buffer, len_in_buffer).
|
||||
method(#class,#primitive) putBytes (rawptr, offset, byte_array, offset_in_buffer, len_in_buffer).
|
||||
}
|
||||
|
||||
|
||||
// TODO: support Pointer arithmetic?
|
||||
class(#limited) SmallPointer(Object)
|
||||
{
|
||||
method(#primitive) asString.
|
||||
|
||||
method(#primitive) getInt8 (offset).
|
||||
method(#primitive) getInt16 (offset).
|
||||
method(#primitive) getInt32 (offset).
|
||||
method(#primitive) getInt64 (offset).
|
||||
method(#primitive) getUint8 (offset).
|
||||
method(#primitive) getUint16 (offset).
|
||||
method(#primitive) getUint32 (offset).
|
||||
method(#primitive) getUint64 (offset).
|
||||
|
||||
method(#primitive) putInt8 (offset, value).
|
||||
method(#primitive) putInt16 (offset, value).
|
||||
method(#primitive) putInt32 (offset, value).
|
||||
method(#primitive) putInt64 (offset, value).
|
||||
method(#primitive) putUint8 (offset, value).
|
||||
method(#primitive) putUint16 (offset, value).
|
||||
method(#primitive) putUint32 (offset, value).
|
||||
method(#primitive) putUint64 (offset, value).
|
||||
|
||||
method(#primitive) getBytes (offset, byte_array, offset_in_buffer, len_in_buffer).
|
||||
method(#primitive) putBytes (offset, byte_array, offset_in_buffer, len_in_buffer).
|
||||
|
||||
method(#primitive) free.
|
||||
}
|
||||
|
||||
class(#limited,#immutable,#word(1)) LargePointer(SmallPointer)
|
||||
{
|
||||
}
|
||||
Reference in New Issue
Block a user