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82 lines
2.2 KiB
82 lines
2.2 KiB
/*
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* jit-init.c - Initialization routines for the JIT.
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*
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* Copyright (C) 2004 Southern Storm Software, Pty Ltd.
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*
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* This file is part of the libjit library.
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*
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* The libjit library is free software: you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation, either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* The libjit library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with the libjit library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include "jit-internal.h"
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#include "jit-rules.h"
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/*@
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* @deftypefun void jit_init (void)
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* This is normally the first function that you call when using
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* @code{libjit}. It initializes the library and prepares for
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* JIT operations.
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*
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* The @code{jit_context_create} function also calls this, so you can
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* avoid using @code{jit_init} if @code{jit_context_create} is the first
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* JIT function that you use.
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*
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* It is safe to initialize the JIT multiple times. Subsequent
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* initializations are quietly ignored.
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* @end deftypefun
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@*/
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void jit_init(void)
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{
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static int init_done = 0;
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/* Make sure that the thread subsystem is initialized */
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_jit_thread_init();
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/* Make sure that the initialization is done only once
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(requires the global lock initialized above) */
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jit_mutex_lock(&_jit_global_lock);
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if(init_done)
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{
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goto done;
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}
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init_done = 1;
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#ifdef JIT_USE_SIGNALS
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/* Initialize the signal handlers */
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_jit_signal_init();
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#endif
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/* Initialize the backend */
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_jit_init_backend();
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done:
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jit_mutex_unlock(&_jit_global_lock);
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}
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/*@
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* @deftypefun int jit_uses_interpreter (void)
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* Determine if the JIT uses a fall-back interpreter to execute code
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* rather than generating and executing native code. This can be
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* called prior to @code{jit_init}.
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* @end deftypefun
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@*/
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int jit_uses_interpreter(void)
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{
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#if defined(JIT_BACKEND_INTERP)
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return 1;
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#else
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return 0;
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#endif
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}
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