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"volatile is the only reliable way to ensure that a local variable 

retains the value it had at the time of the call to longjmp"
This commit is contained in:
Roberto Ierusalimschy 1998-01-28 15:47:05 -02:00
parent 6cdf0d8768
commit 46968b8ffa
1 changed files with 6 additions and 6 deletions
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12
ldo.c
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@ -1,5 +1,5 @@
/* /*
** $Id: ldo.c,v 1.21 1998/01/07 16:26:48 roberto Exp roberto $ ** $Id: ldo.c,v 1.22 1998/01/27 21:21:27 roberto Exp roberto $
** Stack and Call structure of Lua ** Stack and Call structure of Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -288,8 +288,8 @@ int luaD_protectedrun (int nResults)
{ {
jmp_buf myErrorJmp; jmp_buf myErrorJmp;
int status; int status;
struct C_Lua_Stack oldCLS = L->Cstack; volatile struct C_Lua_Stack oldCLS = L->Cstack;
jmp_buf *oldErr = L->errorJmp; jmp_buf *volatile oldErr = L->errorJmp;
L->errorJmp = &myErrorJmp; L->errorJmp = &myErrorJmp;
if (setjmp(myErrorJmp) == 0) { if (setjmp(myErrorJmp) == 0) {
do_callinc(nResults); do_callinc(nResults);
@ -310,10 +310,10 @@ int luaD_protectedrun (int nResults)
*/ */
static int protectedparser (ZIO *z, int bin) static int protectedparser (ZIO *z, int bin)
{ {
int status; volatile int status;
TProtoFunc *tf; TProtoFunc *volatile tf;
jmp_buf myErrorJmp; jmp_buf myErrorJmp;
jmp_buf *oldErr = L->errorJmp; jmp_buf *volatile oldErr = L->errorJmp;
L->errorJmp = &myErrorJmp; L->errorJmp = &myErrorJmp;
if (setjmp(myErrorJmp) == 0) { if (setjmp(myErrorJmp) == 0) {
tf = bin ? luaU_undump1(z) : luaY_parser(z); tf = bin ? luaU_undump1(z) : luaY_parser(z);