Mercurial > hg > Members > menikon > CbC_xv6
annotate src/file_read.cbc @ 146:fd166dda4361
tweak return value at file_read.cbc
| author | anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Sun, 15 Dec 2019 14:15:27 +0900 |
| parents | f70c4ec3fb8a |
| children | 06449f2ae0c7 |
| rev | line source |
|---|---|
| 143 | 1 #include "../context.h" |
| 2 #interface "SysRead.h" | |
| 3 | |
| 4 // ---- | |
| 5 // typedef struct FileRead<Type, Isa> impl SysRead { | |
| 6 // struct file* f; | |
| 7 // int r; | |
| 8 // __code cbc_fileread1(Type* file_read, struct file* f,int r,__code next(r,...)); | |
| 9 // __code next(...); | |
| 10 // } FileRead; | |
| 11 // ---- | |
| 12 | |
| 13 SysRead* createFileRead(struct Context* cbc_context) { | |
| 14 struct SysRead* sys_read = new SysRead(); | |
| 15 struct FileRead* file_read = new FileRead(); | |
| 16 sys_read->sys_read = (union Data*)file_read; | |
| 17 file_read->f = NULL; | |
| 18 file_read->r = 0; | |
| 19 sys_read->impl = NULL; | |
| 20 sys_read->addr = NULL; | |
| 21 sys_read->n = 0; | |
| 22 sys_read->read = C_readFileRead; | |
| 23 sys_read->next = C_nextFileRead; | |
| 24 return sys_read; | |
| 25 } | |
| 26 | |
| 27 SysRead* createFileReadInstFromFile(struct Context* cbc_context, struct file* f,char* addr, int n) { | |
| 28 if (f->type == FD_PIPE) { | |
|
146
fd166dda4361
tweak return value at file_read.cbc
anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
parents:
143
diff
changeset
|
29 return create_piperead(cbc_context, f->pipe, addr, n, next); |
| 143 | 30 } |
| 31 | |
| 32 if (f->type == FD_INODE) { | |
| 33 ilock(f->ip); | |
|
146
fd166dda4361
tweak return value at file_read.cbc
anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
parents:
143
diff
changeset
|
34 return create_readi(cbc_context, f->ip, addr, f->off, n, cbc_fileread1); |
| 143 | 35 } |
|
146
fd166dda4361
tweak return value at file_read.cbc
anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
parents:
143
diff
changeset
|
36 return NULL; //Error? |
| 143 | 37 } |
| 38 | |
| 39 | |
| 40 __code cbc_fileread1FileRead(struct FileRead* file_read, struct file* f,int r,__code next(r,...)) { | |
| 41 | |
| 42 goto next(r,...); | |
| 43 } | |
| 44 | |
| 45 __code nextFileRead(...) { | |
| 46 | |
| 47 } | |
| 48 | |
| 49 __code readFileRead(struct FileRead* sys_read, union Data* impl, char* addr, int n, __code next(int ret,...)) { | |
| 50 | |
| 51 goto next(int ret,...); | |
| 52 } | |
| 53 | |
| 54 __code selectReadInstance(struct file* f) { | |
| 55 if (f->readable == 0) { | |
| 56 goto next(-1); | |
| 57 } | |
| 58 SysRead* read = createFileReadInstFromFile(proc->cbc_context, f); | |
|
146
fd166dda4361
tweak return value at file_read.cbc
anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
parents:
143
diff
changeset
|
59 goto read->read(f,addr,n); |
| 143 | 60 } |
| 61 | |
| 62 __code nextFileRead(...) { | |
| 63 | |
| 64 } | |
| 65 |