std::longjmp
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| Definido no cabeçalho <csetjmp>
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| void longjmp( std::jmp_buf env, int status ); |
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Carrega o
env contexto de execução salvo por uma chamada anterior a setjmp. Esta função não retorna. O controle é transferido para o local chamado do setjmp macro que criou env. setjmp que retorna o valor, passado como o status.Original:
Loads the execution context
env saved by a previous call to setjmp. This function does not return. Control is transferred to the call site of the macro setjmp that set up env. That setjmp then returns the value, passed as the status.The text has been machine-translated via Google Translate.
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Se a função que chamou setjmp foi encerrado, o comportamento é indefinido (em outras palavras, apenas saltos longos até a pilha de chamadas são permitidos)
Original:
If the function that called setjmp has exited, the behavior is undefined (in other words, only long jumps up the call stack are allowed)
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Não destruidores para objetos automáticos são chamados. Se a substituição de
std::longjmp com throw e setjmp com catch iria executar um destrutor não-trivial para qualquer objeto automático, o comportamento de tais std::longjmp é indefinido.Original:
No destructors for automatic objects are called. If replacing of
std::longjmp with throw and setjmp with catch would execute a non-trivial destructor for any automatic object, the behavior of such std::longjmp is undefined.The text has been machine-translated via Google Translate.
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Índice |
[editar] Parâmetros
| env | - | variável referente ao estado de execução do programa guardado por std::setjmp
Original: variable referring to the execution state of the program saved by std::setjmp The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| status | - | o valor para retornar de setjmp. Se for igual a 0, 1 é usado em vez disso
Original: the value to return from setjmp. If it is equal to 0, 1 is used instead The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[editar] Valor de retorno
(Nenhum)
Original:
(none)
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[editar] Exemplo
#include <iostream> #include <csetjmp> std::jmp_buf jump_buffer; [[noreturn]] void a(int count) { std::cout << "a(" << count << ") called\n"; std::longjmp(jump_buffer, count+1); // setjump() will return count+1 } int main() { int count = setjmp(jump_buffer); if (count != 9) { a(count); // This will cause setjmp() to exit } }
Saída:
a(0) called a(1) called a(2) called a(3) called a(4) called a(5) called a(6) called a(7) called a(8) called
[editar] Veja também
| salva o contexto Original: saves the context The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função macro) | |
| Documentação C para longjmp
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