GDB 7.6.50

gdb/osf-share/AT386/cma_thread_io.h

Index: gdb/osf-share/AT386/cma_thread_io.h
diff --git a/gdb/osf-share/AT386/cma_thread_io.h b/gdb/osf-share/AT386/cma_thread_io.h
deleted file mode 100644
index a90dba17583fce19dadbba36127cd519190a4fbd..0000000000000000000000000000000000000000
--- a/gdb/osf-share/AT386/cma_thread_io.h
+++ /dev/null
@@ -1,457 +0,0 @@
-/* 
- * (c) Copyright 1990-1996 OPEN SOFTWARE FOUNDATION, INC.
- * (c) Copyright 1990-1996 HEWLETT-PACKARD COMPANY
- * (c) Copyright 1990-1996 DIGITAL EQUIPMENT CORPORATION
- * (c) Copyright 1991, 1992 Siemens-Nixdorf Information Systems
- * To anyone who acknowledges that this file is provided "AS IS" without
- * any express or implied warranty: permission to use, copy, modify, and
- * distribute this file for any purpose is hereby granted without fee,
- * provided that the above copyright notices and this notice appears in
- * all source code copies, and that none of the names listed above be used
- * in advertising or publicity pertaining to distribution of the software
- * without specific, written prior permission.  None of these organizations
- * makes any representations about the suitability of this software for
- * any purpose.
- */
-/*
- *	Header file for thread synchrounous I/O
- */
-
-#ifndef CMA_THREAD_IO
-#define CMA_THREAD_IO
-
-/*
- *  INCLUDE FILES
- */
-
-#include <cma_config.h>
-#include <sys/file.h>
-#include <cma.h>
-#include <sys/types.h>
-#include <sys/time.h>
-#include <cma_init.h>
-#include <cma_errors.h>
-
-/*
- * CONSTANTS
- */
-
-/*
- * Define symbols which indicate whether to compile code for obsolete 
- * "non-blocking mode" flags:  FNDELAY and FNBLOCK.  If the obsolete
- * symbols are defined, and if their replacement symbols are defined 
- * and are different or if they are undefined, then define a symbol
- * that says to compile the code in; otherwise no code will be compiled
- * for these obsolete symbols.
- */
-#ifdef FNDELAY
-# ifdef O_NDELAY
-#  if O_NDELAY != FNDELAY
-#   define _CMA_FNDELAY_
-#  endif
-# else
-#  define _CMA_FNDELAY_
-# endif
-#endif
-
-#ifdef FNBLOCK
-# ifdef O_NONBLOCK
-#  if O_NONBLOCK != FNBLOCK
-#   define _CMA_FNBLOCK_
-#  endif
-# else
-#  define _CMA_FNBLOCK_
-# endif
-#endif
-
-
-extern cma_t_boolean cma_is_open(int);
-/*
- * Maximum number of files (ie, max_fd+1)
- */
-#define cma__c_mx_file	FD_SETSIZE
-
-/*
- * Number of bits per file descriptor bit mask (ie number of bytes * bits/byte)
- */
-#define cma__c_nbpm	NFDBITS
-
-/*
- * TYPE DEFINITIONS
- */
-
-typedef enum CMA__T_IO_TYPE {
-    cma__c_io_read   = 0,
-    cma__c_io_write  = 1,
-    cma__c_io_except = 2
-    } cma__t_io_type;
-#define cma__c_max_io_type	2
-
-/*
- * From our local <sys/types.h>:
- *
- *  typedef long    fd_mask;
- *
- *  typedef struct fd_set {
- *          fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
- *  } fd_set;
- *
- */
-typedef fd_mask cma__t_mask;
-typedef fd_set  cma__t_file_mask;
-
-
-/*
- *  GLOBAL DATA
- */
-
-/*
- * Maximum number of files (ie, max_fd+1) as determined by getdtablesize().
- */
-extern int	cma__g_mx_file;
-
-/*
- * Number of submasks (ie "int" sized chunks) per file descriptor mask as
- * determined by getdtablesize().
- */
-extern int	cma__g_nspm;
-
-/*
- * MACROS
- */
-
-/*
- * Define a constant for the errno value which indicates that the requested
- * operation was not performed because it would block the process.
- */
-# define cma__is_blocking(s) \
-    ((s == EAGAIN) || (s == EWOULDBLOCK) || (s == EINPROGRESS) || \
-     (s == EALREADY) || (s == EDEADLK))
-
-/*
-*	It is necessary to issue an I/O function, before calling cma__io_wait()
-*	in the following cases:
-*
-*		*	This file descriptor has been set non-blocking by CMA
-*		*	This file descriptor has been set non-blocking by the user.
-*/
-
-#define cma__issue_io_call(fd)					\
-	( (cma__g_file[fd]->non_blocking) || \
-	  (cma__g_file[fd]->user_fl.user_non_blocking) )
-
-
-#define cma__set_user_nonblocking(flags) \
-
-/*
- * Determine if the file is open
- */
-/*
- * If the file gets closed while waiting for the mutex cma__g_file[rfd]
- * gets set to null. This results in a crash if NDEBUG is set to 0 
- * since cma__int_lock tries to dereference it to set the mutex ownership 
- * after it gets the mutex. The following will still set the ownership
- * in cma__int_lock so we'll set it back to noone if cma__g_file is null
- * when we come back just in case it matters. It shouldn't since its no
- * longer in use but..... 
- * Callers of this should recheck cma__g_file after the reservation to
- * make sure continueing makes sense.
- */
-#define cma__fd_reserve(rfd) 	\
-		{ \
-		cma__t_int_mutex *__mutex__; \
-		__mutex__ = cma__g_file[rfd]->mutex; \
-		cma__int_lock (__mutex__); \
-		if(cma__g_file[rfd] == (cma__t_file_obj *)cma_c_null_ptr) \
-			cma__int_unlock(__mutex__); \
-		}
-		
-
-/*
- * Unreserve a file descriptor
- */
-#define cma__fd_unreserve(ufd)	cma__int_unlock (cma__g_file[ufd]->mutex)
-
-/*
- * AND together two select file descriptor masks
- */
-#define cma__fdm_and(target,a,b)					\
-	{								\
-	int __i__ = cma__g_nspm;					\
-	while (__i__--)							\
-	    (target)->fds_bits[__i__] =					\
-		(a)->fds_bits[__i__] & (b)->fds_bits[__i__];		\
-	}
-
-/*
- * Clear a bit in a select file descriptor mask
- *
- * FD_CLR(n, p)  :=  ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
- */
-#define cma__fdm_clr_bit(n,p)	FD_CLR (n, p)
-
-/*
- * Copy the contents of one file descriptor mask into another.  If the 
- * destination operand is null, do nothing; if the source operand is null, 
- * simply zero the destination.
- */
-#define cma__fdm_copy(src,dst,nfds) {					\
-	if (dst)							\
-	    if (src) {							\
-		cma__t_mask *__s__ = (cma__t_mask *)(src);		\
-		cma__t_mask *__d__ = (cma__t_mask *)(dst);		\
-		int __i__;						\
-		for (__i__ = 0; __i__ < (nfds); __i__ += cma__c_nbpm)	\
-		    *__d__++ = *__s__++;				\
-		}							\
-	    else							\
-		cma__fdm_zero (dst);					\
-	    }
-
-/*
- * To increment count for each bit set in fd - mask
- */
-#define cma__fdm_count_bits(map,count)					\
-	{								\
-	int	__i__ = cma__g_nspm;					\
-	while (__i__--) {						\
-	    cma__t_mask    __tm__;				        \
-	    __tm__ = (map)->fds_bits[__i__];				\
-	    while(__tm__) {						\
-		(count)++;						\
-		__tm__ &= ~(__tm__ & (-__tm__)); /* Assumes 2's comp */	\
-		}							\
-	    }								\
-	}
-
-/*
- * Test if a bit is set in a select file descriptor mask
- *
- * FD_ISSET(n,p)  :=  ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
- */
-#define cma__fdm_is_set(n,p)	FD_ISSET (n, p)
-
-/*
- * OR together two select file descriptor masks
- */
-#define cma__fdm_or(target,a,b)						\
-	{								\
-	int __i__ = cma__g_nspm;					\
-	while (__i__--)							\
-	    (target)->fds_bits[__i__] =					\
-		(a)->fds_bits[__i__] | (b)->fds_bits[__i__];		\
-	}
-
-/*
- * Set a bit in a select file descriptor mask
- * 
- * FD_SET(n,p)  :=  ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
- */
-#define cma__fdm_set_bit(n,p)	FD_SET (n, p)
-
-/*
- * Clear a select file descriptor mask.
- */
-#define cma__fdm_zero(n)						\
-	cma__memset ((char *) n, 0, cma__g_nspm * sizeof(cma__t_mask))
-
-
-
-/*
- * CMA "thread-synchronous" I/O read/write operations
- */
-
-    /*
-     * Since all CMA "thread-synchronous" I/O (read or write) operations on 
-     * U*ix follow the exact same structure, the wrapper routines have been
-     * condensed into a macro.
-     *
-     * The steps performed are as follows:
-     *	1. Check that the file descriptor is a legitimate value.
-     *	2. Check that the entry in the CMA file "database" which corresponds to 
-     *	    the file descriptor indicates that the "file" was "opened" by CMA.
-     *  3. Reserve the file, to serialized access to files.  This not only 
-     *	    simplifies things, but also defends against non-reentrancy.
-     *  4. If the "file" is "set" for non-blocking I/O, check if we
-     *      have actually set the file non-blocking yet, and if not do so.
-     *	    Then, issue the I/O operantion.
-     *	    Success or failure is returned immediately, after unreserving the 
-     *	    file.  If the error indicates that the operation would have caused
-     *	    the process to block, continue to the next step.
-     *	5. The I/O prolog adds this "file" to the global bit mask, which 
-     *	    represents all "files" which have threads waiting to perform I/O on 
-     *	    them, and causes the thread to block on the condition variable for
-     *	    this "file".  Periodically, a select is done on this global bit 
-     *	    mask, and the condition variables corresponding to "files" which 
-     *	    are ready for I/O are signaled, releasing those waiting threads to
-     *	    perform their I/O.
-     *  6. When the thread returns from the I/O prolog, it can (hopefully) 
-     *	    perform its operation without blocking the process.
-     *	7. The I/O epilog clears the bit in the global mask and/or signals the 
-     *	    the next thread waiting for this "file", as appropriate.
-     *  8. If the I/O failed, continue to loop.
-     *	9. Finally, the "file" is unreserved, as we're done with it, and the
-     *	    result of the operation is returned.
-     *
-     *
-     * Note:  currently, we believe that timeslicing which is based on the
-     *	    virtual-time timer does not cause system calls to return EINTR.  
-     *	    Threfore, any EINTR returns are relayed directly to the caller.
-     *	    On platforms which do not support a virtual-time timer, the code
-     *	    should probably catch EINTR returns and restart the system call.
-     */
-
-/*
- * This macro is used for both read-type and write-type functions.
- *
- * Note:  the second call to "func" may require being bracketed in a
- *	  cma__interrupt_disable/cma__interrupt_enable pair, but we'll 
- *	  wait and see if this is necessary.
- */
-#define cma__ts_func(func,fd,arglist,type,post_process)	{ \
-    cma_t_integer   __res__; \
-    cma_t_boolean   __done__ = cma_c_false; \
-    if ((fd < 0) || (fd >= cma__g_mx_file)) return (cma__set_errno (EBADF), -1); \
-    if (!cma__is_open(fd)) return (cma__set_errno (EBADF), -1); \
-    cma__fd_reserve (fd); \
-    if (!cma__is_open(fd)) return (cma__set_errno (EBADF), -1); \
-    if (cma__issue_io_call(fd)) {\
-	if ((!cma__g_file[fd]->set_non_blocking) && \
-		(cma__g_file[fd]->non_blocking == cma_c_true)) \
-	    cma__set_nonblocking(fd); \
-        cma__interrupt_disable (0); \
-	TRY { \
-	    __res__ = func arglist; \
-	    } \
-	CATCH_ALL { \
-	    cma__interrupt_enable (0); \
-	    cma__fd_unreserve (fd); \
-	    RERAISE; \
-	    } \
-	ENDTRY \
-        cma__interrupt_enable (0); \
-	if ((__res__ != -1) \
-		|| (!cma__is_blocking (errno)) \
-		|| (cma__g_file[fd]->user_fl.user_non_blocking)) \
-	    __done__ = cma_c_true; \
-	} \
-    if (__done__) { \
-	cma__fd_unreserve (fd); \
-	} \
-    else { \
-	TRY { \
-	    cma__io_prolog (type, fd); \
-	    while (!__done__) { \
-		cma__io_wait (type, fd); \
-		__res__ = func arglist; \
-		if ((__res__ != -1) \
-			|| (!cma__is_blocking (errno)) \
-			|| (cma__g_file[fd]->user_fl.user_non_blocking)) \
-		    __done__ = cma_c_true; \
-		} \
-	    } \
-	FINALLY { \
-	    cma__io_epilog (type, fd); \
-	    cma__fd_unreserve (fd); \
-	    } \
-	ENDTRY \
-	} \
-    if (__res__ != -1)  post_process; \
-    return __res__;  \
-    }
-
-    /*
-     * Since most CMA "thread-synchronous" I/O ("open"-type) operations on 
-     * U*ix follow the exact same structure, the wrapper routines have been
-     * condensed into a macro.
-     *
-     * The steps performed are as follows:
-     *	1. Issue the open function.
-     *	2. If the value returned indicates an error, return it to the caller.
-     *  3. If the file descriptor returned is larger than what we think is the
-     *	    maximum value (ie if it is too big for our database) then bugcheck.
-     *  4. "Open" the "file" in the CMA file database.
-     *	5. Return the file descriptor value to the caller.
-     *
-     * FIX-ME: for the time being, if the I/O operation returns EINTR, we 
-     *	    simply return it to the caller; eventually, we should catch this 
-     *	    and "do the right thing" (if we can figure out what that is).
-     */
-
-/*
- * This macro is used for all "open"-type functions which return a single file
- * desciptor by immediate value.
- */
-#define cma__ts_open(func,arglist,post_process)  {		\
-    int	__fd__;							\
-    TRY {							\
-	cma__int_init ();					\
-	cma__int_lock (cma__g_io_data_mutex);			\
-	__fd__ = func arglist;					\
-	cma__int_unlock (cma__g_io_data_mutex);			\
-	if (__fd__ >= 0 && __fd__ < cma__g_mx_file)		\
-	    post_process;					\
-	}							\
-    CATCH_ALL							\
-	{							\
-	cma__set_errno (EBADF);					\
-	__fd__ = -1;						\
-	}							\
-    ENDTRY							\
-    if (__fd__ >= cma__g_mx_file)				\
-	cma__bugcheck ("cma__ts_open:  fd is too large");	\
-    return __fd__;						\
-    }
-/*
- * This macro is used for all "open"-type functions which return a pair of file
- * desciptors by reference parameter.
- */
-#define cma__ts_open2(func,fdpair,arglist,post_process)  {		\
-    int	    __res__;							\
-    TRY {								\
-	cma__int_init ();						\
-	cma__int_lock (cma__g_io_data_mutex);				\
-	__res__ = func arglist;						\
-	cma__int_unlock (cma__g_io_data_mutex);				\
-	if (__res__ >= 0 && fdpair[0] < cma__g_mx_file			\
-		&& fdpair[1] < cma__g_mx_file)				\
-	    post_process;						\
-	}								\
-    CATCH_ALL								\
-	{								\
-	cma__set_errno (EBADF);						\
-	__res__ = -1;							\
-	}								\
-    ENDTRY								\
-    if ((fdpair[0] >= cma__g_mx_file) || (fdpair[1] >= cma__g_mx_file)) \
-	cma__bugcheck ("cma__ts_open2:  one of fd's is too large"); \
-    return __res__;							\
-    }
-
-/*
- * INTERNAL INTERFACES
- */
-extern void cma__close_general (int);
-
-extern void cma__init_thread_io (void);
-
-extern cma_t_boolean cma__io_available (cma__t_io_type,int,struct timeval *);
-
-extern void cma__io_epilog (cma__t_io_type,int);
-
-extern void cma__io_prolog (cma__t_io_type,int);
-
-extern void cma__io_wait (cma__t_io_type,int);
-
-extern void cma__open_general (int);
-
-extern void cma__reinit_thread_io (int);
-
-extern void cma__set_nonblocking (int);
-
-extern void cma__set_user_nonblock_flags (int,int);
-
-extern cma_t_boolean cma__is_open (int);
-
-
-#endif