Atomic-incf of #x3fffffffffffffff by one results in #x being stored in place. Run-program will return a process structure. Its documentation is accessed by typing help at the debugger prompt. Condition: package-locked-error sb-ext Class precedence list: package-locked-error, package-lock-violation, package-error, error, serious-condition, condition, t Subtype of sb-ext:package-lock-violation. The files will be re-entered into the database when the fasl files (produced by compiling store-coverage-data optimization policy set to 3) are loaded again into the image. Result-prototype corresponds to the result-type of cl:concatenate but receives a prototype instance of an extended sequence class instead of a type specifier. The elimination of tail-recursive frames can be prevented by disabling tail-recursion optimization, which happens when the debug optimization quality is greater than. If the source file can be found, but has been modified since the time it was compiled, the debugger prints this warning: ; File has been modified since compilation: ; filename ; Using form offset instead of character position. If full is true, all generations are collected. By default only compressed cores trigger hinting. The asdf( t/asdf ) component type grovel-constants-file has its perform operation defined to write out a C source file, compile it, and run.
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These are discussed in another chapter, Efficiency. Functions defined by labels and flet will appear as (flet name) and (labels name) respectively. Usage examples:./sp Hello, World! When the sbcl process termination was refactored as part of changes that led to sb-ext:quit being deprecated, sb-unix:unix-exit ceased to be used internally. 11.3 Gray Streams The Gray Streams interface is a widely supported extension that provides for definition of clos-extensible stream classes. If a thread is supplied, function is run in that thread. 16.2.6 Variables Variable: *max-samples* sb-sprof Default number of traces taken. Sbcl determines the default external format according to the following rules: On non-Unicode builds, the default external format is :latin-1.
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The cmucl manual doesnt seem to state it explicitly, but Python has a mental block about type inference when assignment is involved. Function: remove-implementation-package sb-ext packages-to-remove optional package Removes packages-to-remove from the implementation packages of package. A representation that has been printed and read back will work identically in restore-coverage. Nil (the default) means that entries are always preserved. Function: unload-shared-object sb-alien pathname Unloads the shared object loaded earlier using the designated pathname with load-shared-object, to the degree supported on the platform.
Run-time support for converting between specializer names and specializer metaobjects, mostly for the purposes of find-method, is provided by parse-specializer-using-class and which dispatch on their first argument, the generic function associated with a method with the given specializer. tuple" 1,2 2 tuple" : 1,B. We can often avoid supplying an explicit length argument to functions because we already know how long the argument. Only effective if sbcl is compiled with LDB. It may be useful to specify.5 to get backtrace argument display without argument documentation. Function: map-trace-samples sb-sprof function trace Call function on each sample in trace. A null alien pointer can be detected with the sb-alien:null-alien function. Condition: deprecation-condition sb-ext Class precedence list: deprecation-condition, condition, t Superclass for deprecation-related error and warning conditions. This can happen when a function is converted into a macro. This property has been officially obsoleted by the Unicode standard, and is only included for backwards compatibility. Debugger Command: error Prints the condition given to invoke-debugger and the active proceed cases. Sockint:bind replaces sockint:win32-bind) as.2.10 in March 2015.
Arrays are accessed using sb-alien:deref, passing the indices as additional arguments. If source location information is available, but the source location is unknown because of an interrupt or unexpected hardware error (see Unknown Locations and Interrupts then the command will print: Unknown location: using block start. Within Lisp, compile the Lisp file. For file systems whose native conventions allow directories to be indicated as files, if as-directory is true, return a pathname which types of binary options exist denoting thing as a directory. For example, _dev in C becomes stat-DEV in Lisp. W Jump to:?
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Function: thread-yield sb-thread Yield the processor to other threads. Value is an integer. 17.1 sb-aclrepl The which types of binary options exist sb-aclrepl module offers an Allegro CL-style Read-Eval-Print Loop for sbcl, with integrated inspector. When an external foreign value is represented using a Lisp variable, there must be a way to convert from one name syntax into the other. 24 The following fun expressions are also allowed: fun Name/Arity fun Module:Name/Arity In Name/Arity, Name is an atom and Arity is an integer. 8.23 List Comprehensions List comprehensions is a feature of many modern functional programming languages. The reason for restricting the set of valid expressions is that evaluation of a guard expression must be guaranteed to be free of side effects. C-string-pointer - a pointer to a C string, corresponding to the sb-alien:c-string type (see Foreign Type Specifiers ). Streams are not created bivalent by default for performance reasons.
Function: release-mutex sb-thread mutex key if-not-owner Release mutex by setting it to nil. While the cost of keeping sb-unix:unix-exit indefinitely is trivial, the ability to refactor our internals is important, so its deprecation was taken as an opportunity to highlight that SB-unix is an internal package and SB-posix should be used by user-programs. Stepping will be disabled until evaluation of the form is complete. 13.9 Foreign threads which types of binary options exist Direct calls to pthread_create (instead of make-thread) create threads that sbcl is not aware of, these are called foreign threads. If a :default value was not provided, sb-thread:join-thread would signal a sb-thread:join-thread-error instead. disable-debugger By default when sbcl encounters an error, it enters the builtin debugger, allowing interactive diagnosis and possible intercession. Specifying override true causes that form to grab any enclosed warnings, even if it is enclosed by another with-compilation-unit. Debugger Command: help Debugger Command?
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Blocks and tags are also allocated on the heap, unless all non-local control transfers to them are compiled with zero safety. 15.6 Name Service Presently name service is implemented by calling out to the getaddrinfo(3) and gethostinfo(3 or to gethostbyname(3) gethostbyaddr(3) on platforms where the preferred functions are not available. Macro (with-mystruct var (member init).) body body) - allocates an object of type mystruct that is valid in body. 7.8 Unicode Support sbcl provides support for working with Unicode text and querying the standard Unicode database for information about individual codepoints. Cons, list, list and vector when the result is bound to a variable declared dynamic-extent. The return value of BodyT which types of binary options exist then becomes the return value of the ter expression. The debugger doesnt really understand lexical scoping; it has just one namespace for all the variables in the current stack frame. Declaration: global sb-ext Syntax: (sb-ext:global symbol Only valid as a global proclamation. Limitations: Structure type return values are not implemented.
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Remedy Use streams with element-type (unsigned-byte 8) or :default the which types of binary options exist latter allowing both binary and character IO in conjunction with write-sequence. Note : structures with raw slots can currently be stack-allocated only on x86 and x86-64. Can be any positive number 1, with density approaching zero as the threshold approaches. The alternative would be to keep the suboptimal version around forever, possibly alongside an improved version. This is because dotimes expands into: (do (i 0 (1 i) g1 n) ( i g1) *undefined (declare (type unsigned-byte i) The rest of the processing path results from the expansion of do: (block nil (let (i 0) g1 n). 3.4 Initialization Files sbcl processes initialization files with read and eval, not load; hence initialization files can be used to set startup *package* and *readtable and for proclaiming a global optimization policy. A variable is an expression. Every subclass of must define a method for this function. This debug information tells the debugger what it needs to know about the locations in the code where the debugger can be invoked. Hash-function must be a symbol naming a global hash function consistent with the predicate, or be a lambda form implementing one in the current lexical environment. Valid guard expressions are the following: The atom true Other constants (terms and bound variables all regarded as false Calls to the BIFs specified in table Type Test BIFs Term comparisons Arithmetic expressions Boolean expressions Short-circuit expressions (andalso/orelse) is_atom/1 is_binary/1 is_bitstring/1 is_boolean/1 is_float/1. Consider this code: (do (pos 0 (position #a string :start (1 pos) (null pos) (declare (fixnum pos).) Although pos is almost always a fixnum, it is nil at the end of the loop. Generic Function: socket-shutdown sb-bsd-sockets socket key direction Indicate that no communication in direction will be performed on socket.
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Invoking the initial abort restart established by make-thread is equivalent to calling abort-thread in other than main threads. See Threading for information about terminating individual threads. H" ) A list of sb-grovel clauses describing the things you want to grovel from the C compiler, for example: integer af-local or sunos solaris) "AF_unix" #-(or sunos solaris) "AF_local" "Local to host (pipes and file-domain). The innermost actual source form was the symbol *undefined* itself, but that also appeared in the explanation, so the compiler backed out one level. Generic Function: stream-read-sequence sb-gray stream seq optional start end This is like cl:read-sequence, but for Gray streams. Condition: interrupt-thread-error sb-thread Class precedence list: interrupt-thread-error, thread-error, error, serious-condition, condition, t Signalled when interrupting a thread fails because the thread has already exited. The of, catch, and after sections are all optional, as long as there is at least a catch or an after section. 9.3.1 Accessing Foreign Values Function: deref sb-alien pointer-or-array rest indices The sb-alien:deref function returns the value pointed to by a foreign pointer, or the value of a foreign array element. The format of address depends on the socket type (for example for inet domain sockets it would be a list of an ip address and a port).
If loop is true, loop around the body until a sufficient number of samples has been collected. Another example are functions or macros whose current signature makes them hard or impossible to extend in the future: backwards compatible extensions would either make the interface intolerably hairy, or are sometimes outright impossible. (allow-with-interrupts (grab-mutex.).) without-interrupts is necessary to avoid an interrupt unwinding the call while the mutex is in an inconsistent state while allow-with-interrupts allows the call to be interrupted from sleep. Org/ has some general information, plus links to mailing lists devoted to sbcl, and to archives of these mailing lists. Recursive Event Loop sbcl provides a recursive event loop (serve-event) for doing non-blocking IO on multiple streams without using threads. If it just hangs kill it with sigabrt: which types of binary options exist kill -abrt pidof sbcl. If override is false, specified policy is merged with current global policy.
This message is not saying there is a problem somewhere in this let it is saying that there is a problem with the let itself. Note that _exit(2) does not call atexit(3) functions unlike exit(3). In this case the exception is passed on after AfterBody has been evaluated, so the exception from the try expression is the same with an after section as without. Late Deprecation During late deprecation the interface remains as it was during early deprecation, but the compile-time warning is upgraded: when a thing in this deprecation stage is used, a which is a full warning, is signaled at compile-time. Copy state function If from-end is nil, the constructed iterator visits the specified elements in the order in which they appear in sequence. The Lisp name of the variable (see above) becomes a global alien variable. The major information required is an encoding, specified by a keyword naming that encoding; however, it is also possible to specify refinements to that encoding as additional options to the external format designator. # See also Within a single session, threads arbitrate between themselves for the users attention. The value of space mostly influences the compilers decision whether to inline operations, which tend to increase the size of programs. Use the -filter to choose a different resampling algorithm. Function: reset sb-profile Reset the counters for all profiled functions. Shebang lines in standard input script are currently not ignored.
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If an exception occurs during evaluation of ExceptionBody, it is not caught. Reloading may not work as expected if user or library-code has called dlopen(3) on the same shared object. 8.1 The Default External Format Most functions interacting with external formats use a default external format if none is explicitly specified. Example: The left associative arithmetic operators are evaluated left to right: / 2 evaluates.5 evaluates to 26 -.5 evaluates.5. Example: 1 #1 a,. The following example should serve as a cautionary tale: (defvar *foo* nil) (defun show-foo (format t " fooS" *foo (force-output t) (defun demo (schedule-timer (make-timer show-foo).5) (schedule-timer (make-timer show-foo).5) (let foo* t) (sleep.0) (let foo* :surprise!) (sleep. 5.3.5 Unknown Locations and Interrupts The debugger operates using special debugging information attached to the compiled code. Right associative catch Table.6: Operator Precedence When evaluating an expression, the operator with the highest priority is evaluated first. Function: alien-sap sb-alien foreign-value The sb-alien:alien-sap function returns the SAP which points to alien-values data. This is code that did not appear in the original source program; it was introduced by the compiler. 3.2.3 Saving a Core Image sbcl has the ability to save its state as a file for later execution. (At present, no companies or consultants wish to advertise paid support or custom sbcl development in this manual).
Synchronous Timeouts (Deadlines) Certain operations that may suspend execution for extended periods of time such as cl:sleep, thread synchronization primitives, IO and waiting for external processes respect deadlines established for a part of a computation. Structure: gate sb-concurrency Class precedence list: gate, structure-object, t gate type. On Unicode builds, the default external format is determined using nl_langinfo(3) on unix and GetACP on Windows. Function: receive-message sb-concurrency mailbox key timeout Removes the oldest message from mailbox and returns it as the primary value, and a secondary value. In the spirit of dolist, generic sequences can be traversed using the macro Macro: dosequence sb-sequence (element sequence optional return) body body Executes body with element subsequently bound to each element of sequence, then returns return. Consider a deprecated internal interface a reminder for sbcl maintainers not to delete the thing just yet, even though it is seems unused because it has external users. error Same as :output, additionally accepts :output, making all error output routed to the same place as normal output. The functions map, concatenate and merge receive a type designator specifying the type of the constructed sequence as their first argument.
The var-definitions argument is a list of variable definitions, each of the form (name type optional initial-value) The names of the variables are established as symbol-macros; the bindings have lexical scope, and may be assigned with setq or setf. Step, endp, elt, setf, index and copy have dynamic extent. Expected to move into final deprecation in August 2015. If serve-events is true, blocking io on the socket will which types of binary options exist dispatch to the recursive event loop. Aesthetics Ease of Maintenance Sometimes an interface isnt broken or internal, but just inconsistent somehow. And heres a sample use of this class: (flet (format-timestamp (stream) (apply format stream "2 2 D:1 2 0D:0 2 0D " (multiple-value-list (get-decoded-time) (let (output (make-instance :stream *standard-output* :prefix format-timestamp) (loop for string in abc" "def" "ghi do (write-line. The sb-ext:freeze-type declaration declares that a type will never change, which can make type testing (typep, etc.) more efficient for structure types. If the symbol is defined as a global dynamic variable, it may be assigned or bound. Two guard BIFs handle maps:.17 Bit Syntax Expressions E1,.,En Each element Ei specifies a segment of the bit string.
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Generic Function: stream-start-line-p sb-gray stream Is stream known to be positioned at the beginning of a line? Semaphore-notification-status is initially nil. There is absolutely no binary compatibility of core images between different runtime support programs. Function: default-ignorable-p sb-unicode character Returns t if character is a Default_Ignorable_Code_Point Function: grapheme-break-class sb-unicode char Returns the grapheme breaking class of character, as specified in uax #29. Expected to move into late deprecation in August 2015. 3.2.2 End of File By default sbcl also exits on end of input, caused either by user pressing Control-D on an attached terminal, or end of input when using sbcl as part of a shell pipeline. Sbcl, like cmucl before it, relies primarily on the automatic conversion and direct manipulation approaches. (defun i (x y) (declare (type (unsigned-byte 32) x y) (ldb (byte 32 0) (logxor x (lognot y) The result of (lognot y) will be negative and of type (signed-byte 33 so a naive implementation on a 32-bit platform.
8.4 Converting between Strings and Octet Vectors To encode Lisp strings as octet vectors and decode octet vectors as Lisp strings, the following sbcl-specific functions can be used: Function: string-to-octets sb-ext string key external-format start end null-terminate Return. It would appear in a backtrace.) Anonymous functions have string names like "defun FOO". Defined via deftype standard classes, structure classes and condition classes as deprecated. Variables bound in a fun body are local to the fun body. The processing path is a representation of the evaluated forms enclosing the actual source that the compiler encountered when processing the original source. 4 min(list) Returns item from the list with min value.
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(defvar *p (setf *p* (parse-native-namestring tmp #P tmp (pathname-name *p NIL (pathname-directory *p absolute "tmp (native-namestring *p tmp (setf *p* (parse-native-namestring tmp #P tmp" (pathname-name *p "tmp" (pathname-directory *p absolute) (native-namestring *p tmp" ; A non-NIL AS-directory argument to parse-native-namestring. Options allow conditional printing of the trace information and conditional breakpoints on function entry or exit. 2.5.4 Internals Documentation If youre interested in the development of the sbcl system itself, then subscribing to sbcl-devel is a good idea. Warning: The interface described here is experimental: incompatible changes in future sbcl releases are possible, even expected: the concept of implementation packages and the associated operators may be renamed; more operations (such as naming restarts or catch. (declaim (inline c-function) (define-alien-routine c-function (struct c-struct) (i int) (s c-string) (r (struct c-struct) (a (array int 10) ; a function which sets up the parameters to the C function and ; actually calls it (defun call-cfun (with-alien (ar (array. If :locale is t, the users current locale is used (Unix and Win32 only). (signed n) - an signed integer variable that is n bytes long. ListExpr must be an expression, which evaluates to a list of terms. No more I/O may be performed, but inquiries may still be made. Bitwise Rotation sb-rotate-byte provides an efficient primitive for bitwise rotation of integers, an operation required.g. Under these conditions the values of arguments will be available, but might be incorrect.
No size information from the C program will be used. The warning will go away if ecase is used instead of case, or if :the-other is changed. Function: sockopt-bsd-compatible sb-bsd-sockets socket Return the value of the so-bsdcompat socket option for socket. While it is possible to support smaller widths as well, currently this is not implemented. The type of the argument must be a pointer to a fixed-sized object (such as an integer or pointer). Running Unix programs from a setuid process, or in any other situation where the Unix environment is under the control of someone else, is a mother lode of security problems. 2.5 More sbcl Information.5.1 sbcl Homepage The sbcl website. If quality is nil or not given, nothing is done. The name mapping from C is fairly straightforward: SO_rcvlowat becomes sockopt-receive-low-water and (setf sockopt-receive-low-water). TypeSpecifierList is a list of type specifiers, in any order, separated by hyphens (-).