gcc/libjava/posix.cc
Bryce McKinlay 1349c68851 re PR libgcj/25187 (dereferencing type-punned pointer warnings while building libgcj)
2006-02-08  Bryce McKinlay  <mckinlay@redhat.com>

        PR libgcj/25187:
        * gnu/gcj/io/natSimpleSHSStream.cc
        (gnu::gcj::io::SimpleSHSStream::shsFinal): Remove bogus cast.
        * interpret.cc (_Jv_InterpMethod::run): Simplify arguments to
        _Jv_InterpFrame().
        * boehm.cc: #undef some autoconf macros before including gc-config.h.
        (_Jv_MarkObject): Don't mark the class, it is reachable via the vtable.
        (_Jv_MarkArray): Likewise.
        * java/lang/ref/natReference.cc (java::lang::ref::Reference::create):
        Simplify _Jv_GCRegisterDisappearingLink() call.
        * java/lang/Class.h (getComponentType): Use element_type.
        (element_type): New field declaration, as a union with "methods".
        * java/lang/natClassLoader.cc (_Jv_NewArrayClass): Use "element_type".
        * java/net/natVMNetworkInterfacePosix.cc
        (java::net::VMNetworkInterface::getInterfaces): Add "int" cast to
        avoid sign comparison warning.
        * include/java-interp.h (_Jv_InterpFrame): Take thread as second
        argument, not parent call frame.
        * include/x86_64-signal.h (MAKE_THROW_FRAME): Use "gregs" directly,
        without a cast.
        (restore_rt): Declare with hidden visibility, not "static".
        * posix.cc (_Jv_platform_initProperties): Make "tmpdir" a string
        constant.
        * jni.cc (_Jv_JNI_DestroyJavaVM): Use a union to avoid strict alias
        warning

From-SVN: r110783
2006-02-09 01:35:33 +00:00

182 lines
4.1 KiB
C++

// posix.cc -- Helper functions for POSIX-flavored OSs.
/* Copyright (C) 2000, 2001, 2002 Free Software Foundation
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
#include <config.h>
#include "posix.h"
#include <stdlib.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <jvm.h>
#include <java/lang/Thread.h>
#include <java/io/InterruptedIOException.h>
#include <java/util/Properties.h>
#if defined (ECOS)
extern "C" unsigned long long _clock (void);
#endif
#if defined(HAVE_PROC_SELF_EXE)
static char exec_name[20];
// initialized in _Jv_platform_initialize()
#endif
const char *_Jv_ThisExecutable (void)
{
#if defined(DISABLE_MAIN_ARGS)
return "[Embedded App]";
#elif defined(HAVE_PROC_SELF_EXE)
return exec_name;
// initialized in _Jv_platform_initialize()
#else
return _Jv_GetSafeArg (0);
#endif
}
// gettimeofday implementation.
jlong
_Jv_platform_gettimeofday ()
{
#if defined (HAVE_GETTIMEOFDAY)
timeval tv;
gettimeofday (&tv, NULL);
return (tv.tv_sec * 1000LL) + (tv.tv_usec / 1000LL);
#elif defined (HAVE_TIME)
return time (NULL) * 1000LL;
#elif defined (HAVE_FTIME)
struct timeb t;
ftime (&t);
return (t.time * 1000LL) + t.millitm;
#elif defined (ECOS)
// FIXME.
return _clock();
#else
// In the absence of any function, time remains forever fixed.
return 23000;
#endif
}
// Platform-specific VM initialization.
void
_Jv_platform_initialize (void)
{
#if defined (HAVE_SIGACTION)
// We only want this on POSIX systems.
struct sigaction act;
act.sa_handler = SIG_IGN;
sigemptyset (&act.sa_mask);
act.sa_flags = 0;
sigaction (SIGPIPE, &act, NULL);
#else
signal (SIGPIPE, SIG_IGN);
#endif
#if defined (HAVE_PROC_SELF_EXE)
// Compute our executable name
sprintf (exec_name, "/proc/%d/exe", getpid ());
#endif
}
// Set platform-specific System properties.
void
_Jv_platform_initProperties (java::util::Properties* newprops)
{
// A convenience define.
#define SET(Prop,Val) \
newprops->put(JvNewStringLatin1 (Prop), JvNewStringLatin1 (Val))
SET ("file.separator", "/");
SET ("path.separator", ":");
SET ("line.separator", "\n");
const char *tmpdir = ::getenv("TMPDIR");
if (! tmpdir)
tmpdir = "/tmp";
SET ("java.io.tmpdir", tmpdir);
}
static inline void
internal_gettimeofday (struct timeval *result)
{
#if defined (HAVE_GETTIMEOFDAY)
gettimeofday (result, NULL);
#else
jlong val = _Jv_platform_gettimeofday ();
result->tv_sec = val / 1000;
result->tv_usec = (val % 1000) * 1000;
#endif /* HAVE_GETTIMEOFDAY */
}
// A wrapper for select() which ignores EINTR.
int
_Jv_select (int n, fd_set *readfds, fd_set *writefds,
fd_set *exceptfds, struct timeval *timeout)
{
#ifdef HAVE_SELECT
// If we have a timeout, compute the absolute ending time.
struct timeval end, delay;
if (timeout)
{
internal_gettimeofday (&end);
end.tv_usec += timeout->tv_usec;
if (end.tv_usec >= 1000000)
{
++end.tv_sec;
end.tv_usec -= 1000000;
}
end.tv_sec += timeout->tv_sec;
delay = *timeout;
}
else
{
// Placate compiler.
delay.tv_sec = delay.tv_usec = 0;
}
while (1)
{
int r = select (n, readfds, writefds, exceptfds,
timeout ? &delay : NULL);
if (r != -1 || errno != EINTR)
return r;
// Here we know we got EINTR.
if (java::lang::Thread::interrupted ())
throw new java::io::InterruptedIOException (JvNewStringLatin1 ("select interrupted"));
struct timeval after;
if (timeout)
{
internal_gettimeofday (&after);
// Now compute new timeout argument.
delay.tv_usec = end.tv_usec - after.tv_usec;
delay.tv_sec = end.tv_sec - after.tv_sec;
if (delay.tv_usec < 0)
{
--delay.tv_sec;
delay.tv_usec += 1000000;
}
if (delay.tv_sec < 0)
{
// We assume that the user wants a valid select() call
// more than precise timing. So if we get a series of
// EINTR we just keep trying with delay 0 until we get a
// valid result.
delay.tv_sec = 0;
}
}
}
#else /* HAVE_SELECT */
return 0;
#endif
}