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/*
* SPL - The SPL Programming Language
* Copyright (C) 2004, 2005 Clifford Wolf <clifford@clifford.at>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* util.c: Helper functions for fast development with SPL
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#ifndef USEWIN32API
# include <sys/mman.h>
#endif
#include "spl.h"
#include "compat.h"
int spl_eval(struct spl_vm *vm, struct spl_node *ctx, char *module, const char *program)
{
static const char undumpable_reason[] = "Inside an spl_eval() call";
struct spl_asm *as = spl_asm_create();
int rc = 0;
spl_undumpable_inc(vm, undumpable_reason);
as->vm = vm;
if ( spl_compiler(as, program, "eval", 0, 0) ) {
spl_asm_destroy(as);
spl_undumpable_dec(vm, undumpable_reason);
return -1;
}
spl_asm_add(as, SPL_OP_HALT, 0);
struct spl_task *task = spl_task_create(vm, 0);
if ( module )
task->module = module;
if ( ctx ) {
spl_put(vm, task->ctx);
task->ctx = ctx;
}
spl_task_setcode(task, spl_asm_dump(as));
spl_asm_destroy(as);
while ( task->code && !(rc = spl_exec(task)) ) { }
spl_task_destroy(vm, task);
spl_undumpable_dec(vm, undumpable_reason);
return rc;
}
int spl_eval_bytecode(struct spl_vm *vm, struct spl_node *ctx, char *module, struct spl_code *bytecode)
{
int rc = 0;
struct spl_task *task = spl_task_create(vm, 0);
if ( module )
task->module = module;
if ( ctx ) {
spl_put(vm, task->ctx);
task->ctx = ctx;
}
spl_task_setcode(task, bytecode);
while ( task->code && !(rc = spl_exec(task)) ) { }
spl_task_destroy(vm, task);
return rc;
}
struct spl_task *spl_schedule(struct spl_task *task)
{
struct spl_task *orig_task = task;
struct spl_vm *vm = task->vm;
if ( !task ) return 0;
if ( task->flags & SPL_TASK_FLAG_SYSTEM )
if ( (task->flags & SPL_TASK_FLAG_PAUSED) == 0 ) return task;
while (1) {
if ( (task->flags & SPL_TASK_FLAG_ZOMBIE) && (task->flags & SPL_TASK_FLAG_PAUSED) ) {
spl_task_destroy(vm, task);
task = orig_task = vm->task_list;
if ( !task ) return 0;
}
task = task->next;
if ( !task ) task = vm->task_list;
if ( (task->flags & (SPL_TASK_FLAG_PAUSED|SPL_TASK_FLAG_BUSY)) == 0 ) return task;
if ( task == orig_task ) break;
}
return 0;
}
int spl_simple_runloop(struct spl_vm *vm, struct spl_task *wait_task)
{
int rc = 0;
spl_runloop_function *old_rl = vm->runloop;
vm->runloop = spl_simple_runloop;
struct spl_task *task = wait_task ? wait_task : vm->task_list;
while ( task && task->code ) {
spl_gc_maybe(vm);
task = spl_schedule(task);
if ( spl_exec(task) < 0 )
goto got_error;
}
if (wait_task && wait_task != task)
got_error: rc = -1;
vm->runloop = old_rl;
return rc;
}
void *spl_mmap_file(const char *filename, int *size)
{
#ifndef USEWIN32API
int fd = open(filename, O_RDONLY|MY_O_BINARY);
if (fd < 0) return 0;
struct stat stbuf;
fstat(fd, &stbuf);
int mapsize = stbuf.st_size;
int pagesize = getpagesize();
if ( mapsize % pagesize )
mapsize += pagesize - (mapsize % pagesize);
char *ret = mmap(0, mapsize, PROT_READ, MAP_PRIVATE, fd, 0);
if (ret && size)
*size = stbuf.st_size;
close(fd);
return ret;
#else
return spl_malloc_file(filename, size);
#endif
}
void *spl_malloc_file(const char *filename, int *size)
{
int fd = open(filename, O_RDONLY|MY_O_BINARY);
if (fd < 0) return 0;
struct stat stbuf;
fstat(fd, &stbuf);
char *ret = malloc(stbuf.st_size+1);
for (int i=0, rc; i<stbuf.st_size; i+=rc) {
rc = read(fd, ret+i, stbuf.st_size-i);
if ( rc <= 0 ) {
free(ret);
return 0;
}
}
ret[stbuf.st_size] = 0;
if (ret && size)
*size = stbuf.st_size;
close(fd);
return ret;
}
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