0025215: Porting to Android - fix minor issues

STEPConstruct_AP203Context = pw_gecos member of passwd struct disabled in android case.
Standard_Atomic - correct usage of __atomic_inc()/__atomic_dec().
Standard_CLocaleSentry - Android doesn't support locales in the C library.
Standard_MMgrOpt - use "/dev/zero" and "/dev/null" for allocation of memory blocks on Android.
OSD_Chronometer - fix compilation on Android.
OSD_Disk, OSD_signal - fix headers inclusion on Android.

src/OSD/OSD_Chronometer.cxx

@@ -57,7 +57,7 @@
 //=======================================================================
 void OSD_Chronometer::GetProcessCPU (Standard_Real& UserSeconds, Standard_Real& SystemSeconds)
 {
-#if defined(LIN) || defined(linux) || defined(__FreeBSD__)
+#if defined(LIN) || defined(linux) || defined(__FreeBSD__) || defined(__ANDROID__)
   static const long aCLK_TCK = sysconf(_SC_CLK_TCK);
 #else
   static const long aCLK_TCK = CLK_TCK;
@@ -87,7 +87,7 @@ void OSD_Chronometer::GetThreadCPU (Standard_Real& theUserSeconds,
     theUserSeconds   = Standard_Real(aTaskInfo.user_time.seconds)   + 0.000001 * aTaskInfo.user_time.microseconds;
     theSystemSeconds = Standard_Real(aTaskInfo.system_time.seconds) + 0.000001 * aTaskInfo.system_time.microseconds;
   }
-#elif defined(_POSIX_TIMERS) && defined(_POSIX_THREAD_CPUTIME)
+#elif (defined(_POSIX_TIMERS) && defined(_POSIX_THREAD_CPUTIME)) || defined(__ANDROID__)
   // on Linux, only user times are available for threads via clock_gettime()
   struct timespec t;
   if (!clock_gettime (CLOCK_THREAD_CPUTIME_ID, &t))

src/OSD/OSD_Disk.cxx

@@ -12,7 +12,7 @@
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
-#ifndef WNT
+#ifndef _WIN32
 
 #include <OSD_Disk.ixx>
 #include <OSD_WhoAmI.hxx>
@@ -23,7 +23,14 @@ const OSD_WhoAmI Iam = OSD_WDisk;
 extern "C" {
 #endif
 
-#include <sys/statvfs.h>
+#if defined(__ANDROID__)
+  #include <sys/vfs.h>
+  #define statvfs  statfs
+  #define fstatvfs fstatfs
+#else
+  #include <sys/statvfs.h>
+  int statvfs(const char *, struct statvfs *);
+#endif
 
 #ifdef __cplusplus
 }
@@ -31,8 +38,6 @@ extern "C" {
 
 #include <errno.h>
 
-extern "C" {int statvfs(const char *, struct statvfs *); }
-
 OSD_Disk::OSD_Disk() : myQuotaSize(0) {}
 
 

src/OSD/OSD_signal.cxx

@@ -13,7 +13,7 @@
 
 #include <OSD.ixx>
 
-#ifndef WNT
+#ifndef _WIN32
 
 //---------- All Systems except Windows NT : ----------------------------------
 
@@ -68,7 +68,10 @@ typedef void (* SIG_PFV) (int);
 typedef void (* SIG_PFV) (int);
 
 #include <signal.h>
-#include <sys/signal.h>
+
+#if !defined(__ANDROID__)
+  #include <sys/signal.h>
+#endif
 
 #if defined(HAVE_PTHREAD_H) && defined(NO_CXX_EXCEPTION)
 //============================================================================

src/STEPConstruct/STEPConstruct_AP203Context.cxx

@@ -167,7 +167,7 @@ Handle(StepBasic_PersonAndOrganization) STEPConstruct_AP203Context::DefaultPerso
     // construct person`s name
     OSD_Process sys;
     Standard_CString usr = sys.UserName().ToCString();
-#ifndef WNT
+#if !defined(_WIN32) && !defined(__ANDROID__)
     if ( usr ) {
       struct passwd *pwd = getpwnam ( usr );
       if ( pwd ) usr = pwd->pw_gecos;

src/Standard/Standard_Atomic.hxx

@@ -27,10 +27,6 @@
 #ifndef _Standard_Atomic_HeaderFile
 #define _Standard_Atomic_HeaderFile
 
-#if defined(__ANDROID__)
-  #include <sys/atomics.h>
-#endif
-
 //! Increments atomically integer variable pointed by theValue
 //! and returns resulting incremented value.
 inline int Standard_Atomic_Increment (volatile int* theValue);
@@ -59,7 +55,7 @@ int Standard_Atomic_Decrement (volatile int* theValue)
   return __sync_sub_and_fetch (theValue, 1);
 }
 
-#elif defined(_WIN32) || defined(__WIN32__)
+#elif defined(_WIN32)
 extern "C" {
   long _InterlockedIncrement (volatile long* lpAddend);
   long _InterlockedDecrement (volatile long* lpAddend);
@@ -100,20 +96,22 @@ int Standard_Atomic_Decrement (volatile int* theValue)
 }
 
 #elif defined(__ANDROID__)
+
 // Atomic operations that were exported by the C library didn't
 // provide any memory barriers, which created potential issues on
 // multi-core devices. Starting from ndk version r7b they are defined as
 // inlined calls to GCC sync builtins, which always provide a full barrier.
 // It is strongly recommended to use newer versions of ndk.
+#include <sys/atomics.h>
 
 int Standard_Atomic_Increment (volatile int* theValue)
 {
-  return __atomic_inc (theValue);
+  return __atomic_inc (theValue) + 1; // analog of __sync_fetch_and_add
 }
 
 int Standard_Atomic_Decrement (volatile int* theValue)
 {
-  return __atomic_dec (theValue);
+  return __atomic_dec (theValue) - 1; // analog of __sync_fetch_and_sub
 }
 
 #elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64))

src/Standard/Standard_CLocaleSentry.cxx

@@ -19,6 +19,8 @@
 
 #include <cstring>
 
+#if !defined(__ANDROID__)
+
 namespace
 {
 
@@ -79,9 +81,10 @@ Standard_CLocaleSentry::Standard_CLocaleSentry()
 #endif
 #endif
 {
-#ifndef HAVE_XLOCALE_H
+#if !defined(HAVE_XLOCALE_H)
   const char* aPrevLocale = (const char* )myPrevLocale;
-  if (aPrevLocale[0] == 'C' && aPrevLocale[1] == '\0')
+  if (myPrevLocale == NULL
+   || (aPrevLocale[0] == 'C' && aPrevLocale[1] == '\0'))
   {
     myPrevLocale = NULL; // already C locale
     return;
@@ -101,7 +104,7 @@ Standard_CLocaleSentry::Standard_CLocaleSentry()
 // =======================================================================
 Standard_CLocaleSentry::~Standard_CLocaleSentry()
 {
-#ifdef HAVE_XLOCALE_H
+#if defined(HAVE_XLOCALE_H)
   uselocale ((locale_t )myPrevLocale);
 #else
   if (myPrevLocale != NULL)
@@ -118,3 +121,5 @@ Standard_CLocaleSentry::~Standard_CLocaleSentry()
 #endif
 #endif
 }
+
+#endif // __ANDROID__

src/Standard/Standard_CLocaleSentry.hxx

@@ -39,6 +39,8 @@
   #include <xlocale.h>
 #endif
 
+#if !defined(__ANDROID__)
+
 //! This class intended to temporary switch C locale and logically equivalent to setlocale(LC_ALL, "C").
 //! It is intended to format text regardless of user locale settings (for import/export functionality).
 //! Thus following calls to sprintf, atoi and other functions will use "C" locale.
@@ -57,7 +59,7 @@ public:
   Standard_EXPORT Standard_CLocaleSentry();
 
   //! Restore previous locale.
-  Standard_EXPORT virtual ~Standard_CLocaleSentry();
+  Standard_EXPORT ~Standard_CLocaleSentry();
 
 public:
 
@@ -88,4 +90,17 @@ private:
 
 };
 
+#else
+
+//! C/C++ runtime on Android currently supports only C-locale, no need to call anything.
+class Standard_CLocaleSentry
+{
+public:
+  Standard_CLocaleSentry() {}
+  typedef void* clocale_t;
+  static clocale_t GetCLocale() { return 0; }
+};
+
+#endif // __ANDROID__
+
 #endif // _Standard_CLocaleSentry_H__

src/Standard/Standard_MMgrOpt.cxx

@@ -247,7 +247,7 @@ void Standard_MMgrOpt::Initialize()
       perror("ERR_MEMRY_FAIL");
 #endif
     
-#if defined(IRIX) || defined(__sgi) || defined(SOLARIS) || defined(__sun) || defined(LIN) || defined(linux) || defined(__FreeBSD__)
+#if defined(IRIX) || defined(__sgi) || defined(SOLARIS) || defined(__sun) || defined(LIN) || defined(linux) || defined(__FreeBSD__) || defined(__ANDROID__)
     if ((myMMap = open ("/dev/zero", O_RDWR)) < 0) {
       if ((myMMap = open ("/dev/null", O_RDWR)) < 0){
         myMMap = 0;