interim commit while adding pio.c

qse/lib/cmn/syscall.h

@@ -0,0 +1,52 @@
+#ifndef _QSE_LIB_CMN_SYSCALL_H_
+#define _QSE_LIB_CMN_SYSCALL_H_
+
+#if defined(HAVE_UNISTD_H)
+#include <unistd.h>
+#endif
+
+#if defined(QSE_USE_SYSCALL) && defined(HAVE_SYS_SYSCALL_H)
+#include <sys/syscall.h>
+#endif
+
+#ifdef SYS_open
+	#define QSE_OPEN(path,flags,mode) syscall(SYS_open,path,flags,mode)
+#else
+	#define QSE_OPEN(path,flags,mode) open(path,flags,mode)
+#endif
+
+#ifdef SYS_close
+	#define QSE_CLOSE(handle) syscall(SYS_close,handle)
+#else
+	#define QSE_CLOSE(handle) close(handle)
+#endif
+
+#ifdef SYS_read
+	#define QSE_READ(handle,buf,size) syscall(SYS_read,handle,buf,size)
+#else
+	#define QSE_READ(handle,buf,size) read(handle,buf,size)
+#endif
+
+#ifdef SYS_write
+	#define QSE_WRITE(handle,buf,size) syscall(SYS_write,handle,buf,size)
+#else
+	#define QSE_WRITE(handle,buf,size) write(handle,buf,size)
+#endif
+
+#if !defined(_LP64) && defined(SYS_ftruncate64)
+	#define QSE_FTRUNCATE(handle,size) syscall(SYS_ftruncate64,handle,size)
+#elif defined(SYS_ftruncate)
+	#define QSE_FTRUNCATE(handle,size) syscall(SYS_ftruncate,handle,size)
+#elif !defined(_LP64) && defined(HAVE_FTRUNCATE64)
+	#define QSE_FTRUNCATE(handle,size) ftruncate64(handle,size)
+#else
+	#define QSE_FTRUNCATE(handle,size) ftruncate(handle,size)
+#endif
+
+#ifdef SYS_fork
+	#define QSE_FORK() syscall(SYS_fork)
+#else
+	#define QSE_FORK() fork()
+#endif
+
+#endif