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Unified Diff: gdb/osf-share/AT386/cma_thread_io.h

Issue 124383005: GDB 7.6.50 (Closed) Base URL: http://git.chromium.org/native_client/nacl-gdb.git@upstream
Patch Set: Created 6 years, 11 months ago
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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
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