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filesystem vtable

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This commit is contained in:
IonutParau
2025-05-28 18:10:56 +02:00
parent 38425792b1
commit f77f6d86ce
6 changed files with 452 additions and 18 deletions
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35
src/neonucleus.h
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@@ -347,6 +347,7 @@ void nn_loadCoreComponentTables(nn_universe *universe);
// loading each component
void nn_loadEepromTable(nn_universe *universe);
void nn_loadFilesystemTable(nn_universe *universe);
void nn_loadDriveTable(nn_universe *universe);
// the helpers
@@ -395,10 +396,8 @@ typedef struct nn_filesystemControl {
// speed
// used to calculate the latency of seeking a file. It will treat the file as continuous within the storage medium, which is completely
// unrealistic. Essentially, after a seek, it will check how much the file pointer was changed. If it went backwards, it will pretend
// the whole drive had to spin. You can imagine the drive spinning counter-clockwise.
// Seeks are assumed to be *chunked* too, so seeking within a chunk, even backwards, won't actually do anything.
// Set it to 0 to disable seek latency.
// unrealistic. Essentially, after a seek, it will check how much the file pointer was changed. If it went backwards, the drive spins
// in the opposite direction. Drives work the same way.
int pretendRPM;
double readLatencyPerChunk;
double writeLatencyPerChunk;
@@ -408,13 +407,19 @@ typedef struct nn_filesystemControl {
double randomLatencyMax;
// thermals
double motorHeat; // this times how many chunks have been seeked will be the heat addres, +/- the heat range.
double heatRange;
double motorHeat; // this times how many chunks have been seeked will be the heat addres, +/- the motor heat range.
double motorHeatRange;
double writeHeatPerChunk;
// call budget
size_t readCostPerChunk;
size_t writeCostPerChunk;
size_t seekCostPerChunk;
// energy cost
double readEnergyCost;
double writeEnergyCost;
double motorEnergyCost;
} nn_filesystemControl;
typedef struct nn_filesystem {
@@ -434,7 +439,7 @@ typedef struct nn_filesystem {
size_t (*size)(nn_component *component, void *userdata, const char *path);
bool (*remove)(nn_component *component, void *userdata, const char *path);
size_t (*lastModified)(nn_component *component, void *userdata, const char *path);
bool (*rename)(nn_component *component, void *userdata, const char *from, const char *to);
size_t (*rename)(nn_component *component, void *userdata, const char *from, const char *to);
bool (*exists)(nn_component *component, void *userdata, const char *path);
// directory operations
@@ -447,10 +452,11 @@ typedef struct nn_filesystem {
// file operations
size_t (*open)(nn_component *component, void *userdata, const char *path, const char *mode);
void (*close)(nn_component *component, void *userdata, int fd);
size_t (*seek)(nn_component *component, void *userdata, int fd, int whence, int off);
bool (*close)(nn_component *component, void *userdata, int fd);
bool (*write)(nn_component *component, void *userdata, int fd, const char *buf, size_t len);
size_t (*read)(nn_component *component, void *userdata, int fd, char *buf, size_t required);
bool (*write)(nn_component *component, void *userdata, int fd, char *buf, size_t len);
// moved is an out pointer that says how many bytes the pointer moved.
size_t (*seek)(nn_component *component, void *userdata, int fd, const char *whence, int off, int *moved);
} nn_filesystem;
nn_filesystem *nn_volatileFileSystem(size_t capacity, nn_filesystemControl *control);
@@ -468,7 +474,8 @@ typedef struct nn_driveControl {
double randomLatencyMax;
double motorHeat;
double heatRange;
double motorHeatRange;
double writeHeatPerSector;
// These are per sector
double motorEnergyCost;
@@ -476,9 +483,9 @@ typedef struct nn_driveControl {
double writeEnergyCost;
// call budget
size_t readCostPerChunk;
size_t writeCostPerChunk;
size_t seekCostPerChunk;
size_t readCostPerSector;
size_t writeCostPerSector;
size_t seekCostPerSector;
} nn_driveControl;
typedef struct nn_drive {