setjmp
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| definiert in Header <csetjmp>
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| #define setjmp(env) /* implementation-defined */ |
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Speichert die aktuelle Ausführungskontext in eine Variable
env vom Typ std::jmp_buf. Diese Variable kann später verwendet, um die aktuelle Ausführung Kontext std::longjmp Funktion wiederherzustellen. Das heißt, wenn ein Anruf an std::longjmp Funktion gemacht wird, geht die Ausführung zum bestimmten Anruf Website, die die variable std::jmp_buf übergebenen std::longjmp konstruiert. In diesem Fall setjmp kehrt tho übergebenen Wert std::longjmp .Original:
Saves the current execution context into a variable
env of type std::jmp_buf. This variable can later be used to restore the current execution context by std::longjmp function. That is, when a call to std::longjmp function is made, the execution continues at the particular call site that constructed the std::jmp_buf variable passed to std::longjmp. In that case setjmp returns tho value passed to std::longjmp.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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Inhaltsverzeichnis |
[Bearbeiten] Parameter
| env | - | Variable, um den Ausführungszustand des Programms zu retten .
Original: variable to save the execution state of the program to. The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[Bearbeiten] Rückgabewert
0 wenn das Makro durch den ursprünglichen Code aufgerufen wurde und die Ausführung Kontext wurde
env gespeichert .Original:
0 if the macro was called by the original code and the execution context was saved to
env.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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Nicht-Null-Wert, wenn ein Sprung nicht lokalen gerade ausgeführt wurde. Der Rückgabewert der gleiche wie für std::longjmp übergeben .
Original:
Non-zero value if a non-local jump was just performed. The return value in the same as passed to std::longjmp.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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[Bearbeiten] Beispiel
#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 } }
Output:
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
[Bearbeiten] Siehe auch
| springt zum angegebenen Ort Original: jumps to specified location The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktion) | |
| C documentation for setjmp
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