1 // posix.cc -- Helper functions for POSIX-flavored OSs.
3 /* Copyright (C) 2000, 2001, 2002 Free Software Foundation
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
20 #include <java/lang/Thread.h>
21 #include <java/io/InterruptedIOException.h>
22 #include <java/util/Properties.h>
25 extern "C" unsigned long long _clock (void);
28 #if defined(HAVE_PROC_SELF_EXE)
29 static char exec_name[20];
30 // initialized in _Jv_platform_initialize()
33 const char *_Jv_ThisExecutable (void)
35 #if defined(DISABLE_MAIN_ARGS)
36 return "[Embedded App]";
37 #elif defined(HAVE_PROC_SELF_EXE)
39 // initialized in _Jv_platform_initialize()
41 return _Jv_GetSafeArg (0);
45 // gettimeofday implementation.
47 _Jv_platform_gettimeofday ()
49 #if defined (HAVE_GETTIMEOFDAY)
51 gettimeofday (&tv, NULL);
52 return (tv.tv_sec * 1000LL) + (tv.tv_usec / 1000LL);
53 #elif defined (HAVE_TIME)
54 return time (NULL) * 1000LL;
55 #elif defined (HAVE_FTIME)
58 return (t.time * 1000LL) + t.millitm;
63 // In the absence of any function, time remains forever fixed.
68 // Platform-specific VM initialization.
70 _Jv_platform_initialize (void)
72 #if defined (HAVE_SIGACTION)
73 // We only want this on POSIX systems.
75 act.sa_handler = SIG_IGN;
76 sigemptyset (&act.sa_mask);
78 sigaction (SIGPIPE, &act, NULL);
80 signal (SIGPIPE, SIG_IGN);
83 #if defined (HAVE_PROC_SELF_EXE)
84 // Compute our executable name
85 sprintf (exec_name, "/proc/%d/exe", getpid ());
89 // Set platform-specific System properties.
91 _Jv_platform_initProperties (java::util::Properties* newprops)
93 // A convenience define.
94 #define SET(Prop,Val) \
95 newprops->put(JvNewStringLatin1 (Prop), JvNewStringLatin1 (Val))
97 SET ("file.separator", "/");
98 SET ("path.separator", ":");
99 SET ("line.separator", "\n");
100 char *tmpdir = ::getenv("TMPDIR");
103 SET ("java.io.tmpdir", tmpdir);
107 internal_gettimeofday (struct timeval *result)
109 #if defined (HAVE_GETTIMEOFDAY)
110 gettimeofday (result, NULL);
112 jlong val = _Jv_platform_gettimeofday ();
113 result->tv_sec = val / 1000;
114 result->tv_usec = (val % 1000) * 1000;
115 #endif /* HAVE_GETTIMEOFDAY */
118 // A wrapper for select() which ignores EINTR.
120 _Jv_select (int n, fd_set *readfds, fd_set *writefds,
121 fd_set *exceptfds, struct timeval *timeout)
124 // If we have a timeout, compute the absolute ending time.
125 struct timeval end, delay;
128 internal_gettimeofday (&end);
129 end.tv_usec += timeout->tv_usec;
130 if (end.tv_usec >= 1000000)
133 end.tv_usec -= 1000000;
135 end.tv_sec += timeout->tv_sec;
141 delay.tv_sec = delay.tv_usec = 0;
146 int r = select (n, readfds, writefds, exceptfds,
147 timeout ? &delay : NULL);
148 if (r != -1 || errno != EINTR)
151 // Here we know we got EINTR.
152 if (java::lang::Thread::interrupted ())
153 throw new java::io::InterruptedIOException (JvNewStringLatin1 ("select interrupted"));
155 struct timeval after;
158 internal_gettimeofday (&after);
159 // Now compute new timeout argument.
160 delay.tv_usec = end.tv_usec - after.tv_usec;
161 delay.tv_sec = end.tv_sec - after.tv_sec;
162 if (delay.tv_usec < 0)
165 delay.tv_usec += 1000000;
167 if (delay.tv_sec < 0)
169 // We assume that the user wants a valid select() call
170 // more than precise timing. So if we get a series of
171 // EINTR we just keep trying with delay 0 until we get a
177 #else /* HAVE_SELECT */