[Patch] Rewrite PosixProcess

[David Daney]

The bits in PosixProcess were getting stale and I thought it was time to 
freshen them up a some.

The main motivation for the patch is to make it possible for libgcj to 
interact with other code that forks processes and catches SIGCHLD.

The main change is that we iterate through each known PosixProcess and 
try to wait specifically for it instead of all processes whenever we 
receive a SIGCHLD.  This allows other code to wait for its own processes.

Tested on x86_64-pc-linux-gnu (FC6) with no failures in libjava.

OK to commit?

2007-05-06  David Daney  <ddaney@avtrex.com>

    PR libgcj/29324
    * include/posix-threads.h (_Jv_BlockSigchld): Declare.
    (_Jv_UnBlockSigchld): Same.
    * posix-threads.cc: Include posix-threads.h.
    (block_sigchld) Rename to...
    (_Jv_BlockSigchld) ... this.
    (_Jv_UnBlockSigchld): New function.
    (_Jv_InitThreads): Call _Jv_BlockSigchld in place of block_sigchld.
    (_Jv_ThreadStart): Same.
    * java/lang/PosixProcess$ProcessManager.h: Regenerate.
    * java/lang/PosixProcess.java: Clean up imports.
    (ProcessManager): Make final.
    (ProcessManager.queue): Genericise.
    (ProcessManager.pidToProcess): Remove.
    (ProcessManager.liveProcesses): New field.
    (ProcessManager.reaperPID): Remove.
    (ProcessManager.nativeData): New field.
    (ProcessManager.removeProcessFromMap): Remove.
    (ProcessManager.addProcessToMap):Remove.
    (ProcessManager.run): Rewritten.
    (ProcessManager.reap): Change method signature,
    (getErrorStream): Correct formatting.
    (getInputStream): Same.
    (spawn): Add process to liveProcesses list.
    (pid): Make package private.
    * java/lang/PosixProcess.h: Regenerate.
    * java/lang/natPosixProcess.cc: Include posix.h and posix-threads.h.
    Add useing namespace java::lang.
    (ProcessManagerInternal): New struct.
    (sigchld_handler): Rewritten.
    (init): Rewritten.
    (waitForSignal): Same.
    (reap): Same.
    (signalReaper): Same.
    (nativeDestroy): Call kill as ::kill.
    (nativeSpawn): Correct formatting.

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: process.diff.txt
URL: <http://gcc.gnu.org/pipermail/java-patches/attachments/20070507/25ff3d7d/attachment.txt>