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posix: allow specifiying mmap flags

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Change 'shared' to a flags parameter so that we can specify flags other
than MAP_PRIVATE or MAP_SHARED.
This commit is contained in:
Avi Kivity
2014-12-11 10:48:33 +02:00
parent ee339bb6ea
commit fe8785fb6a
1 changed files with 6 additions and 6 deletions
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12
core/posix.hh
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@@ -226,25 +226,25 @@ public:
throw_system_error_on(r == -1);
}
void *map(size_t size, unsigned prot, bool shared, size_t offset) {
void *x = mmap(NULL, size, prot, shared ? MAP_SHARED : MAP_PRIVATE, _fd, offset);
void *map(size_t size, unsigned prot, unsigned flags, size_t offset) {
void *x = mmap(NULL, size, prot, flags, _fd, offset);
throw_system_error_on(x == MAP_FAILED);
return x;
}
void *map_shared_rw(size_t size, size_t offset) {
return map(size, PROT_READ | PROT_WRITE, true, offset);
return map(size, PROT_READ | PROT_WRITE, MAP_SHARED, offset);
}
void *map_shared_ro(size_t size, size_t offset) {
return map(size, PROT_READ, true, offset);
return map(size, PROT_READ, MAP_SHARED, offset);
}
void *map_private_rw(size_t size, size_t offset) {
return map(size, PROT_READ | PROT_WRITE, false, offset);
return map(size, PROT_READ | PROT_WRITE, MAP_PRIVATE, offset);
}
void *map_private_ro(size_t size, size_t offset) {
return map(size, PROT_READ, false, offset);
return map(size, PROT_READ, MAP_PRIVATE, offset);
}
private: