christoph/lecture-operating-system-development
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add semaphore to cgastream

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This commit is contained in:
Christoph Urlacher
2022-07-17 01:27:13 +02:00
parent 982843ad84
commit b158f98639
1 changed files with 7 additions and 1 deletions
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8
c_os/devices/CGA_Stream.h
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@ -17,6 +17,7 @@
#include "devices/CGA.h" #include "devices/CGA.h"
#include "lib/OutStream.h" #include "lib/OutStream.h"
#include "lib/Semaphore.h"
// NOTE: I added these classes to allow for easier stream-like color changing // NOTE: I added these classes to allow for easier stream-like color changing
class fgc { class fgc {
@ -51,18 +52,23 @@ class CGA_Stream : public OutStream, public CGA {
private: private:
CGA_Stream(CGA_Stream& copy) = delete; // Verhindere Kopieren CGA_Stream(CGA_Stream& copy) = delete; // Verhindere Kopieren
Semaphore sem;
public: public:
CGA::color color_fg; CGA::color color_fg;
CGA::color color_bg; CGA::color color_bg;
bool blink; bool blink;
CGA_Stream() : color_fg(CGA::LIGHT_GREY), color_bg(CGA::BLACK), blink(false) { CGA_Stream() : sem(1), color_fg(CGA::LIGHT_GREY), color_bg(CGA::BLACK), blink(false) {
flush(); flush();
} }
// Methode zur Ausgabe des Pufferinhalts der Basisklasse StringBuffer. // Methode zur Ausgabe des Pufferinhalts der Basisklasse StringBuffer.
void flush() override; void flush() override;
void lock() { sem.p(); }
void unlock() { sem.v(); }
// Change stream color // Change stream color
template<typename T> template<typename T>
// requires std::derived_from<T, CGA_Stream> // requires std::derived_from<T, CGA_Stream>